Heart failure occurs when an individual's heart is unable to meet their body's demands because it cannot pump blood well enough. Other conditions can cause individuals to develop heart failure. Examples include high blood pressure, coronary artery disease, faulty heart valves, cardiomyopathy, myocarditis, congenital heart defects, heart arrhythmia, and diabetes.
Heart failure can be classified into different types depending on what region is failing. Left-sided heart failure causes blood and fluid to back up in the lungs because the left side of the heart cannot pump enough blood fast enough out of the heart. Fluid may back up in the patient's feet, abdomen, and legs when they have right-sided heart failure because the heart cannot pump enough blood fast enough into the lungs. Systolic heart failure means the patient's heart is unable to contract vigorously and has a pumping malfunction. Diastolic heart failure means an individual's left ventricle cannot relax entirely and has a filling malfunction.
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