Diagnosis and Evaluation of Heart Failure (2024)

Diagnosis and Evaluation of Heart Failure (1)

MICHAEL KING, MD, JOE KINGERY, DO, AND BARETTA CASEY, MD, MPH

Am Fam Physician. 2012;85(12):1161-1168

More recent articles on heart failure and cardiomyopathy are available.

Patient information: A handout on this topic is available at https://familydoctor.org/familydoctor/en/diseases-conditions/heart-failure.html.

Author disclosure: No relevant financial affiliations to disclose.

Heart failure is a common clinical syndrome characterized by dyspnea, fatigue, and signs of volume overload, which may include peripheral edema and pulmonary rales. Heart failure has high morbidity and mortality rates, especially in older persons. Many conditions, such as coronary artery disease, hypertension, valvular heart disease, and diabetes mellitus, can cause or lead to decompensation of chronic heart failure. Up to 40 to 50 percent of patients with heart failure have diastolic heart failure with preserved left ventricular function, and the overall mortality is similar to that of systolic heart failure. The initial evaluation includes a history and physical examination, chest radiography, electrocardiography, and laboratory assessment to identify causes or precipitating factors. A displaced cardiac apex, a third heart sound, and chest radiography findings of venous congestion or interstitial edema are useful in identifying heart failure. Systolic heart failure is unlikely when the Framingham criteria are not met or when B-type natriuretic peptide level is normal. Echocardiography is the diagnostic standard to confirm systolic or diastolic heart failure through assessment of left ventricular ejection fraction. Evaluation for ischemic heart disease is warranted in patients with heart failure, especially if angina is present, given that coronary artery disease is the most common cause of heart failure.

Heart failure is a common clinical syndrome characterized by dyspnea, fatigue, and signs of volume overload, which may include peripheral edema and pulmonary rales. There is no single diagnostic test for heart failure; therefore, it remains a clinical diagnosis requiring a history, physical examination, and laboratory testing. Symptoms of heart failure can be caused by systolic or diastolic dysfunction. Appropriate diagnosis and therapy for heart failure are important given the poor prognosis. Survival is 89.6 percent at one month from diagnosis, 78 percent at one year, and only 57.7 percent at five years.1

Heart failure has an estimated overall prevalence of 2.6 percent.2 It is becoming more common in adults older than 65 years because of increased survival after acute myocardial infarction and improved treatment of coronary artery disease (CAD), valvular disease, and hypertension.

Clinical recommendationEvidence ratingReferences
The initial evaluation of patients with suspected heart failure should include a history and physical examination, laboratory assessment, chest radiography, and electrocardiography. Echocardiography can confirm the diagnosis.C3
A displaced cardiac apex, a third heart sound, and chest radiography findings of pulmonary venous congestion or interstitial edema are good predictors to rule in the diagnosis of heart failure.C21, 23
Systolic heart failure can be effectively ruled out with a normal B-type natriuretic peptide or N-terminal pro–B-type natriuretic peptide level.C2123, 25, 27, 28
Systolic heart failure can be effectively ruled out when the Framingham criteria are not met.C17, 29

Causes

Heart failure is defined by the American Heart Association and American College of Cardiology as “a complex clinical syndrome that can result from any structural or functional cardiac disorder that impairs the ability of the ventricle to fill with or eject blood.”3 As cardiac output decreases because of stresses placed on the myocardium, activation of the sympathetic nervous and renin-angiotensin-aldosterone systems increases blood pressure (for tissue perfusion) and blood volume (enhancing preload, stroke volume, and cardiac output by the Frank-Starling mechanism). These compensatory mechanisms can also lead to further myocardial deterioration and worsening myocardial contractility. In systolic heart failure, cardiac output is decreased directly through reduced left ventricular function. In diastolic heart failure, cardiac output is compromised by poor ventricular compliance, impaired relaxation, and worsened end-diastolic pressure.3,4

CAD is the underlying etiology in up to 60 to 70 percent of patients with systolic heart failure,5,6 and a predictor for progression from asymptomatic to symptomatic left ventricular systolic dysfunction. Hypertension and valvular heart disease are significant risk factors for heart failure, with relative risks of 1.4 and 1.46, respectively.6 Diabetes mellitus increases the risk of heart failure twofold by directly leading to cardiomyopathy and significantly contributing to CAD. Diabetes is one of the strongest risk factors for heart failure in women with CAD.7 Smoking, physical inactivity, obesity, and lower socioeconomic status are often overlooked risk factors.6 Numerous conditions can cause heart failure, either acutely without an underlying cardiac disorder or through decompensation of chronic heart failure (Table 1).3,4,8 As a result, alternative causes should be promptly recognized, treated, and monitored to determine if the heart failure is reversible.8

Diagnosis and Evaluation of Heart Failure (2)
Heart failure
Common
Coronary artery disease
Hypertension
Idiopathic cardiomyopathy
Valvular heart disease
Less common
Arrhythmia (e.g., tachycardia, bradycardia, heart block)
Collagen vascular disease (e.g., systemic lupus erythematosus, scleroderma)
Endocrine/metabolic disorders (e.g., thyroid disease, diabetes mellitus, pheochromocytoma, other genetic disorders)
Hypertrophic cardiomyopathy
Myocarditis
Pericarditis
Postpartum cardiomyopathy
Restrictive cardiomyopathies (e.g., amyloidosis, hemochromatosis, sarcoidosis, other genetic disorders)
Toxic cardiomyopathy (e.g., alcohol, cocaine, radiation)
Volume overload or heart failure decompensation
Anemia
Atrial fibrillation or other arrhythmias
Fluid overload (e.g., salt intake, water intake, medication compliance)
Fluid retention from drugs (e.g., chemotherapy, cyclooxygenase 1 and 2 inhibitors, excessive licorice, glitazones, glucocorticoids, androgens, estrogens)
Hyper- or hypothyroid disease
Pulmonary causes (e.g., cor pulmonale, pulmonary hypertension, pulmonary embolism)
Renal causes (e.g., renal failure, nephrotic syndrome, glomerulonephritis)
Sleep apnea
Systemic infection or septic shock

Classification

The most important consideration when categorizing heart failure is whether left ventricular ejection fraction (LVEF) is preserved or reduced (less than 50 percent).3,8 A reduced LVEF in systolic heart failure is a powerful predictor of mortality.9 As many as 40 to 50 percent of patients with heart failure have diastolic heart failure with preserved left ventricular function.2,1016 Overall, there is no difference in survival between diastolic and systolic heart failure that cannot be attributed to ejection fraction.2,1016 Patients with diastolic heart failure are more likely to be women, to be older, and to have hypertension, atrial fibrillation, and left ventricular hypertrophy, but no history of CAD.1114,17,18 Compared with systolic heart failure, which has well-validated therapies, diastolic heart failure lacks evidence-based treatment recommendations.3,8,13

Heart failure symptoms can occur with preserved or reduced ejection fraction, (systolic or diastolic heart failure). The New York Heart Association classification system is the simplest and most widely used method to gauge symptom severity (Table 2).19 The classification system is a well-established predictor of mortality and can be used at diagnosis and to monitor treatment response.

Diagnosis and Evaluation of Heart Failure (3)
ClassDescription
INo limitations of physical activity
No heart failure symptoms
IIMild limitation of physical activity
Heart failure symptoms with significant exertion; comfortable at rest or with mild activity
IIIMarked limitation of physical activity
Heart failure symptoms with mild exertion; only comfortable at rest
IVDiscomfort with any activity
Heart failure symptoms occur at rest

Initial Clinical Evaluation

Although no single item on clinical history, sign, or symptom has been proven to be diagnostic, many are helpful in assessing the probability of heart failure. The initial clinical evaluation, detailed in Tables 1,3,4,8 3,3,8,20 and 4,3,8,20 is directed at confirming heart failure, determining potential causes, and identifying comorbid illnesses. Table 5 lists findings for the initial evaluation of suspected heart failure, including history, physical examination, chest radiography, electrocardiography, and B-type natriuretic peptide (BNP) testing.17,2123 Evaluation for ischemic heart disease is warranted in patients with heart failure, especially if angina is present, given that CAD is the most common cause of heart failure.

Diagnosis and Evaluation of Heart Failure (4)
Heart failure
Symptoms
Abdominal swelling
Dyspnea on exertion
Edema
Exercise intolerance
Fatigue
Orthopnea
Paroxysmal nocturnal dyspnea
Recent weight gain
Physical examination findings
Abdomen: hepatojugular reflux, ascites
Extremities: cool, dependent edema
Heart: bradycardia/tachycardia, laterally displaced point of maximal impulse, third heart sound (gallop or murmur)
Lungs: labored breathing, rales
Neck: elevated jugular venous pressure
Skin: cyanosis, pallor
Alternative causes
Symptoms
Abdominal swelling (liver failure)
Anorexia, weight loss (sarcoidosis)
Chest pain (coronary artery disease)
Claudication (atherosclerotic disease)
Cough (pulmonary disease)
Diarrhea or skin lesions (amyloidosis)
Dyspnea on exertion (pulmonary disease, valvular disease)
Edema (liver or kidney failure)
Neurologic problems (sarcoidosis)
Palpitations (tachyarrhythmia)
Recent fevers, viral infection (endocarditis, myocarditis, infection)
Syncope (bradycardia, heart block)
Physical examination findings
Abdomen: distended, hepatosplenomegaly, tender, ascites (liver disease)
Extremities: joint inflammation/warmth (rheumatologic disease)
Heart: irregular rate or rhythm (arrhythmia)
Lungs: wheezing (pulmonary disease)
Neck: thyromegaly/nodule (thyroid disease)
Skin: cyanosis (anemia), jaundice (liver failure)
Diagnosis and Evaluation of Heart Failure (5)
Initial tests
B-type natriuretic peptide level
Calcium and magnesium levels (diuretics, cause of arrhythmia)
Complete blood count (anemia)
Liver function (hepatic congestion, volume overload)
Renal function (renal causes)
Serum electrolyte level (electrolyte imbalance)
Thyroid-stimulating hormone level (thyroid disorders)
Urinalysis (renal causes)
Other tests for alternative causes
Arterial blood gases (hypoxia, pulmonary disease)
Blood cultures (endocarditis, systemic infection)
Human immunodeficiency virus (cardiomyopathy)
Lyme serology (bradycardia/heart block)
Serum ferritin level, transferrin saturation (macrocytic anemia, hemochromatosis)
Thiamine level (deficiency, beriberi, alcoholism)
Troponin and creatine kinase-MB levels (myocardial infarction, myocardial injury)
Tests for comorbid conditions, risk management
A1C level (diabetes mellitus)
Lipid profile (hyperlipidemia)
Diagnosis and Evaluation of Heart Failure (6)
Ruling in heart failure
Finding has conclusive effectPositive likelihood ratio > 10Specificity
Displaced cardiac apex*160.95
Third heart sound110.99
Chest radiography: interstitial edema120.97
Chest radiography: venous congestion120.96
Finding has moderate effectPositive likelihood ratio of 5 to 10Specificity
History of heart failure5.80.90
Hepatojugular reflex6.40.96
Jugular venous distension5.10.92
Finding has small effectPositive likelihood ratio of 2 to 5Specificity
Framingham criteria for systolic heart failure4.570.79
Framingham criteria for heart failure4.350.79
Framingham criteria for diastolic heart failure4.210.79
Initial clinical judgment4.40.86
History of myocardial infarction3.10.87
Rales (crackles)2.80.78
Murmur2.60.90
Paroxysmal nocturnal dyspnea2.60.84
Peripheral edema2.30.78
Orthopnea2.20.77
Elevated BNP level2.920.66
Elevated N-terminal pro-BNP level2.670.65
Chest radiography: cardiomegaly3.30.78
Chest radiography: pleural effusion3.20.92
ECG: atrial fibrillation3.80.93
ECG: new T-wave change3.00.92
ECG: any abnormality 2.20.78

History and Physical Examination

Patients with heart failure can have decreased exercise tolerance with dyspnea, fatigue, generalized weakness, and fluid retention, with peripheral or abdominal swelling and possibly orthopnea.3 Patient history and physical examination are useful to evaluate for alternative or reversible causes (Table 1).3,4,8 Nearly all patients with heart failure have dyspnea on exertion. However, heart failure accounts for only 30 percent of the causes of dyspnea in the primary care setting.24 The absence of dyspnea on exertion only slightly decreases the probability of systolic heart failure, and the presence of orthopnea or paroxysmal nocturnal dyspnea has a small effect in increasing the probability of heart failure (positive likelihood ratio [LR+] = 2.2 and 2.6).21,23

The presence of a third heart sound (ventricular filling gallop) is an indication of increased left ventricular end-diastolic pressure and a decreased LVEF. Despite being relatively uncommon findings, a third heart sound and displaced cardiac apex are good predictors of left ventricular dysfunction and effectively rule in the diagnosis of systolic heart failure (LR+ = 11 and 16).21,23

The presence of jugular venous distention, hepatojugular reflux, pulmonary rales, and pitting peripheral edema is indicative of volume overload and enhances the probability of a heart failure diagnosis. Jugular venous distention and hepatojugular reflex have a moderate effect (LR+ = 5.1 and 6.4), whereas the others, along with cardiac murmurs, have only a small effect on the diagnostic probability (LR+ = 2.3 to 2.8). The absence of any of these findings is of little help in ruling out heart failure.21

Laboratory Tests

Laboratory testing can help identify alternative and potentially reversible causes of heart failure. Table 4 lists laboratory tests appropriate for the initial evaluation of heart failure and other potential causes.3,8,20 Other laboratory tests should be performed based on physician discretion to evaluate further causes or identify comorbid conditions that require enhanced control.

BNP and N-terminal pro-BNP (the cleaved inactive N-terminal fragment of the BNP precursor) levels can be used to evaluate patients with dyspnea for heart failure. BNP is secreted by the atria and ventricles in response to stretching or increased wall tension.25 BNP levels increase with age, are higher in women and blacks, and can be elevated in patients with renal failure.21,26 BNP appears to have better reliability than N-terminal pro-BNP, especially in older populations.25,26 Multiple systematic reviews have concluded that BNP and N-terminal pro-BNP levels can effectively rule out a diagnosis of heart failure22,25,27,28 because of their negative predictive value (negative likelihood ratio [LR–] = 0.1 and 0.14).22 The average cutoff levels for heart failure were a BNP level of 95 pg per mL (95 ng per L) or a N-terminal pro-BNP level of 642 pg per mL (642 ng per L).22

As BNP levels increase, the specificity increases and thus the likelihood of a heart failure diagnosis.25 BNP levels are strong predictors of mortality at two to three months and cardiovascular events in acute heart failure, specifically when BNP level is greater than 200 pg per mL (200 ng per L) or N-terminal pro-BNP level is greater than 5,180 pg per mL (5,180 ng per L).22,25 Limited evidence supports monitoring reduction of BNP levels in the acute and outpatient settings. A 30 to 50 percent reduction in BNP level at hospital discharge showed improved survival and reduced rehospitalization rates. Optimizing management for outpatient targets of a BNP level less than 100 pg per mL (100 ng per L) and an N-terminal pro-BNP level less than 1,700 pg per mL (1,700 ng per L) showed improvement in decompensations, hospitalizations, and mortality events.22,25

Chest Radiography

Chest radiography should be performed initially to evaluate for heart failure because it can identify pulmonary causes of dyspnea (e.g., pneumonia, pneumothorax, mass). Pulmonary venous congestion and interstitial edema on chest radiography in a patient with dyspnea make the diagnosis of heart failure more likely (LR+ = 12). Other findings, such as pleural effusion or cardiomegaly, may slightly increase the likelihood of heart failure (LR+ = 3.2 and 3.3), but their absence is only slightly useful in decreasing the probability of heart failure (LR– = 0.33 to 0.48).21

Electrocardiography

Electrocardiography (ECG) is useful for identifying other causes in patients with suspected heart failure. Changes such as left bundle branch block, left ventricular hypertrophy, acute or previous myocardial infarction, or atrial fibrillation can be identified and may warrant further investigation by echocardiography, stress testing, or cardiology consultation. Normal findings (or minor abnormalities) on ECG make systolic heart failure only slightly less likely (LR– = 0.27).23 The presence of other findings such as atrial fibrillation, new T-wave changes, or any abnormality has a small effect on the diagnostic probability of heart failure (LR+ = 2.2 to 3.8).21

Clinical Decision Making

The definition of heart failure continues to be debated, but it remains a clinical diagnosis. Several groups have published diagnostic criteria, but the Framingham criteria are widely accepted and include the components of the initial evaluation, which enhances their accuracy (Table 6).17 A previous study validated the Framingham criteria for diagnosing systolic heart failure,29 and a more recent study analyzed them for systolic and diastolic heart failure.17 Both studies reported high sensitivity for systolic heart failure (97 percent compared with 89 percent for diastolic heart failure), which effectively rules out heart failure when the Framingham criteria are not met (LR– = 0.04).17,29 The Framingham criteria only have a small effect on confirming a diagnosis of heart failure (LR+ = 4.21 to 4.57), but have a moderate effect on ruling out heart failure in general and diastolic heart failure (LR– = 0.1 and 0.13).17

Diagnosis and Evaluation of Heart Failure (7)
Major criteria
Acute pulmonary edema
Cardiomegaly
Hepatojugular reflex
Neck vein distension
Paroxysmal nocturnal dyspnea or orthopnea
Rales
Third heart sound gallop
Minor criteria
Ankle edema
Dyspnea on exertion
Hepatomegaly
Nocturnal cough
Pleural effusion
Tachycardia (> 120 beats per minute)

Echocardiography is the most widely accepted and available method for identifying systolic dysfunction and should be performed after the initial evaluation to confirm the presence of heart failure.3 Two-dimensional echocardiography with Doppler flow studies can assess LVEF, left ventricular size, wall thickness, valve function, and the pericardium. Echocardiography can assist in diagnosing diastolic heart failure if elevated left atrial pressure, impaired left ventricular relaxation, and decreased compliance are present.2,3 Often, the diagnosis of diastolic heart failure is clinical without conclusive echocardiographic evidence. If echocardiography results are equivocal or inadequate, transesophageal echocardiography, radionuclide angiography, or cineangiography with contrast media (at catheterization) can be used to assess cardiac function.30

If angina or chest pain is present with heart failure, the American Heart Association and the American College of Cardiology recommend that the patient undergo coronary angiography, unless there is a contraindication to potential revascularization.3 Coronary angiography has been shown to improve symptoms and survival in patients with angina and reduced ejection fraction.3 It is important to evaluate for CAD because it is the cause of heart failure and low ejection fraction in approximately two-thirds of patients.4,5 Because wall motion abnormalities are common in nonischemic cardiomyopathy, noninvasive testing may not be adequate for assessing the presence of CAD, and cardiology consultation may be warranted.

Figure 1 is an algorithm for the evaluation and diagnosis of heart failure. When a patient presents with symptoms of heart failure, the initial evaluation is performed to identify alternative or reversible causes of heart failure and to confirm its presence. If the Framingham criteria are not met, or if the BNP level is normal, systolic heart failure is essentially ruled out. Echocardiography should be performed to assess LVEF when heart failure is suspected or if diastolic heart failure is still suspected when systolic heart failure is ruled out. Treatment options are guided by the final diagnosis and echocardiography results, with a consideration to evaluate for CAD.

Diagnosis and Evaluation of Heart Failure (8)

Data Sources: A PubMed search was completed in Clinical Queries using the following key words in various combinations under the search by clinical study category: heart failure, symptoms, causes, diagnosis, diagnostic criteria, diastolic, systolic, brain natriuretic peptide. The categories searched included etiology, diagnosis, clinical prediction rules, and systematic reviews. The articles consisted of meta-analyses, systematic reviews, randomized controlled trials, and cohort studies. The related citations feature was used to locate similar research once appropriate articles had been discovered. We also searched the Agency for Healthcare Research and Quality Evidence Reports, Bandolier, the Cochrane Database of Systematic Reviews, the Database of Abstracts of Reviews of Effects, the Institute for Clinical Systems Improvement, and the National Guideline Clearinghouse database. Search dates: April 5 through 16, 2010; May 24 through 28, 2010; selected newer articles January 1 and April 20, 2011.

Diagnosis and Evaluation of Heart Failure (2024)

FAQs

How long can a 70 year old live with congestive heart failure? ›

How long can a person live with congestive heart failure? Research estimates that more than half of all people with congestive heart failure will survive for 5 years after diagnosis. About 35% will survive for 10 years.

What diagnostic study is used in the evaluation of the heart failure? ›

Echocardiogram. Computed tomography (CT) scan.

Can heart failure be reversed with medication? ›

For most people, heart failure is a long-term condition that can't be cured. But treatment can help keep the symptoms under control, possibly for many years.

What is the difference between heart failure and congestive heart failure? ›

Congestive heart failure (CHF) and heart failure are chronic progressive conditions characterized by a weakened heart that is unable to pump enough blood to meet the body's energy needs. Heart failure often refers to early-stage weakening of the heart without congestion.

What is one of the last signs of congestive heart failure? ›

These are the common symptoms of end-stage heart failure:
  • pain.
  • breathlessness on minimal exertion or at rest.
  • persistent cough.
  • fatigue (extreme tiredness)
  • limited physical activity.
  • depression and anxiety.
  • constipation.
  • loss of appetite and nausea (feeling sick)
Jul 26, 2022

How long until heart failure is fatal? ›

However, despite the advancements, 5 years is the life expectancy of about 50% of those diagnosed with CHF. 90% of those in advanced CHF stages will pass away within a year. At moderate stages, patients average 10 years. One of the reasons why CHF is so dangerous is that it goes undetected for long.

What is the number one symptom of heart failure? ›

Heart failure symptoms may include: Shortness of breath with activity or when lying down. Fatigue and weakness. Swelling in the legs, ankles and feet.

What should the oxygen level be for congestive heart failure? ›

British Thoracic Society Guideline for oxygen use in adults in healthcare and emergency settings recommended target oxygen saturation of 94% to 98% for AHF patients. This target should be reduced to 88% to 92% if the patient is at risk of hypercapnic respiratory failure.

What is a dangerously low ejection fraction? ›

A low number can be serious. If your ejection fraction is 35% or below, you're at high risk of developing a dangerous arrhythmia or even heart failure.

What is the new wonder drug for heart failure? ›

In a recent clinical trial, semaglutide (Wegovy) improved symptoms of heart failure, quality of life, weight loss, and other factors in patients with obesity and with heart failure.

Do you sleep a lot with heart failure? ›

Can heart problems make you sleep a lot? As your heart works overtime, it can cause tiredness, shortness of breath and feeling worn out. These symptoms are all signs of fatigue, one of the most common symptoms of congestive heart failure.

What is the only diet that can reverse heart disease? ›

Groundbreaking research shows that a plant-based diet doesn't just prevent heart disease but that it can manage and sometimes even reverse it.

What does stage 1 heart failure feel like? ›

Stage 1 of Congestive Heart Failure

This news may be surprising, as stage one of CHF does not exhibit any symptoms. Although CHF cannot be cured, you can make healthy lifestyle changes and take certain medication to manage this condition.

What are three things that can worsen heart failure and why? ›

Factors that can worsen symptoms of heart failure

anaemia (a condition where the blood doesn't have enough healthy red blood cells) too much salt, fluid, or alcohol in your diet. pregnancy. some viral and bacterial infections.

What is a good blood pressure for someone with heart failure? ›

National guidelines for HF and hypertension recommend that SBP levels should be controlled in patients with HFpEF in general and to less than 130 mm Hg in patients with HF and persistent hypertension.

What does stage 4 congestive heart failure look like? ›

Stage IV is the most advanced stage of heart failure. Patients have known systolic heart failure and advanced symptoms, even with drastic lifestyle changes and the highest level of care. While at rest, patients still experience symptoms of breathlessness and fatigue, and physical activity is likely not possible.

What is the most common cause of death in heart failure patients? ›

Approximately 90% of heart failure patients die from cardiovascular causes. Fifty per cent die from progressive heart failure, and the remainder die suddenly from arrhythmias and ischaemic events.

What is a good ejection fraction for a 70 year old? ›

55 to 70% – Normal heart function. 40 to 55% – Below normal heart function. Can indicate previous heart damage from heart attack or cardiomyopathy. Higher than 75% – Can indicate a heart condition like hypertrophic cardiomyopathy, a common cause of sudden cardiac arrest.

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