Why do patients with heart failure experience dizziness?

　　In general, dizziness in patients with heart failure may be caused by excessive physical activity, emotional changes, hypotension, anemia, arrhythmia, and other factors. Symptomatic management through general treatment and medication is needed. If discomfort occurs, it is recommended to seek medical advice promptly and receive appropriate treatment under a doctor's guidance. A detailed explanation is as follows:

　　1. Excessive Physical Activity

　　Patients with heart failure have limited cardiac reserve function. When patients engage in physical activities beyond their tolerance level, the body's demand for oxygen and energy increases. The heart cannot meet this increased demand, leading to insufficient blood supply to the brain and resulting in dizziness. Patients are advised to ensure adequate rest and avoid overexertion.

　　2. Emotional Changes

　　Patients with heart failure often experience emotional problems such as anxiety and depression due to long-term illness. These negative emotions cause sympathetic nervous system activation, increasing blood pressure and heart rate, thereby increasing the burden on the heart. Emotional fluctuations can also cause blood vessel constriction, affecting blood supply to the brain and subsequently causing dizziness. Patients are advised to learn how to regulate their emotions and relieve psychological stress through communication with family and friends.

　　3. Hypotension

　　Heart failure patients have impaired circulation and weakened pumping function. If patients do not drink enough water or remain bedridden for extended periods, it may lead to reduced blood volume in the body, causing hypotension. Hypotension results in insufficient blood supply to the brain, causing dizziness, possibly accompanied by symptoms such as fatigue, pallor, and blurred vision. It is recommended to use medications such as midodrine tablets, flunarizine hydrochloride capsules, and propranolol hydrochloride tablets as prescribed by a doctor to alleviate symptoms.

　　4. Anemia

　　Heart failure patients may develop anemia due to insufficient cardiac pumping function, which can lead to reduced red blood cell production or increased destruction. Anemia decreases red blood cell content in the blood, affecting oxygen and blood supply to the brain, thus causing dizziness, possibly accompanied by symptoms such as pallor, fatigue, palpitations, and shortness of breath. It is recommended to undergo treatment with medications such as ferrous sulfate sustained-release tablets, ferrous fumarate tablets, and ammonium ferric citrate vitamin B1 syrup II under a doctor's guidance.

　　5. Arrhythmia

　　Heart failure patients have abnormal cardiac electrophysiological activity and are prone to arrhythmias such as atrial fibrillation and ventricular tachycardia, which can reduce cerebral blood flow, causing dizziness, possibly accompanied by symptoms such as palpitations, chest tightness, and dyspnea. It is recommended to use medications such as propafenone hydrochloride tablets, atropine sulfate injection, and metoprolol tartrate tablets as prescribed by a doctor to alleviate symptoms.

　　Heart failure patients are advised to rest more, ensure sufficient sleep, avoid overexertion, and reduce the burden on the heart.