{'fraction_non_alphanumeric': 0.022174535050071532, 'fraction_numerical': 0.0, 'mean_word_length': 5.447004608294931, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Management of Chronic Heart Failure in Adults: Guidelines From the National Institute for Health and Clinical Excellence

What is the problem and what is known about it so far? Heart failure occurs when the heart becomes unable to pump blood efficiently. Symptoms include difficulty with breathing and leg swelling. Although many things can cause heart failure, high blood pressure and narrow blood vessels of the heart are common causes. Echocardiography and serum natriuretic peptide measurement can help to diagnose and monitor heart failure. Echocardiography uses sound waves to take pictures of the heart and assess its pumping and relaxation functions. When pumping function is impaired, the cause of heart failure is left ventricular systolic dysfunction. When pumping function is preserved but there is evidence of impaired relaxation of the heart, heart failure is associated with preserved ejection fraction. Serum natriuretic peptide measurement involves a blood test; levels are classified as normal, raised (somewhat abnormal), or high (very abnormal). Some patients with heart failure benefit from electronic devices surgically placed under the skin, which involve wires to the heart. Cardiac resynchronization therapy (CRT) synchronizes the ventricles. An intraventricular cardiac-defibrillator (ICD) monitors the rhythm of the heart and, if needed, delivers a shock to normalize it.