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The pathogenesis and prognosis of end-stage heart disease
1Clayton Foundation for Research Cardiovascular Laboratories, Texas Heart Institute, Houston, Texas 77030, USA.
Insights
Congestive heart failure (CHF) occurs when the heart cannot pump enough blood. This condition has a poor prognosis, with many patients becoming candidates for cardiac transplantation due to high mortality.
Area of Science:
- Cardiology
- Internal Medicine
Background:
- Congestive heart failure (CHF) is a common endpoint for various heart diseases.
- It is characterized by the heart's inability to meet metabolic demands due to impaired pumping or filling.
- CHF encompasses systolic dysfunction (impaired contractility) and diastolic dysfunction (impaired ventricular relaxation).
Purpose of the Study:
- To provide an overview of congestive heart failure (CHF).
- To discuss the general features, prognosis, and treatment challenges of CHF.
- To highlight indicators of a poor prognosis in CHF patients.
Main Methods:
- This abstract synthesizes information on congestive heart failure (CHF).
- It reviews the pathophysiology, clinical features, and prognostic factors associated with CHF.
- Information is presented based on established medical knowledge and clinical observations.
Main Results:
- CHF presents with features like pressure/volume overload, muscle loss, or restrictive filling.
- The prognosis for CHF is generally poor, with a 5-year mortality rate of 50%, higher in specific patient groups.
- Poor prognostic indicators include advanced age, cardiomegaly, low cardiac index, elevated left-ventricular end-diastolic pressure, reduced ejection fraction, and arrhythmias.
Conclusions:
- Congestive heart failure (CHF) is a serious condition with limited treatment options, primarily palliative.
- A significant proportion of CHF patients face high mortality, necessitating consideration for advanced therapies like cardiac transplantation.
- Identifying poor prognostic markers is crucial for patient management and treatment planning in CHF.
Abstract:
The final outcome of many forms of heart disease is congestive heart failure (CHF), a condition in which the heart can no longer pump enough blood to fulfill the body's metabolic requirements. Systolic heart failure is characterized by an impairment of myocardial contractility, whereas diastolic heart failure results from the left ventricle's inability to distend normally. The general features of CHF include pressure or volume overload, muscle loss, decreased myocardial contractility, or restrictive filling. Treatment is palliative, and 50% of the patients with CHF can be expected to die within 5 years; the mortality is much higher in those with coronary disease or limiting symptoms. The following signs are associated with a particularly poor prognosis: age > 55 years, cardiomegaly, a cardiac index of < 3, a left-ventricular end-diastolic pressure of > 20 mmHg, an ejection fraction of < 30%, a thin ventricular wall, dyspnea, and evidence of atrial fibrillation or ventricular tachycardia. Because of their high mortality, many of these patients eventually become candidates for cardiac transplantation.
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