Does sudden cardiac death relate to coronary heart disease?

Written by Xie Zhi Hong

Cardiology

Updated on November 12, 2024

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Some studies suggest that 70% of sudden cardiac deaths are caused by arrhythmias. Most of these arrhythmia-induced sudden deaths are associated with coronary artery atherosclerosis. Some are caused by acute myocardial infarction leading to sudden cardiac death. These are all caused by coronary heart disease. Therefore, sudden cardiac death is related to coronary heart disease. Thus, if coronary heart disease is suspected in a patient, it is crucial to perform early examinations and treatments to prevent the occurrence of myocardial infarction. Typical symptoms of coronary heart disease include intermittent chest tightness and chest pain, which can improve after a few minutes, and should therefore be taken seriously.

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Written by Zhang Yue Mei

Cardiology

52sec

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Does sudden cardiac death have a connection with overwork?

Sudden cardiac death is directly related to overexertion, particularly in individuals with coronary heart disease, congenital heart disease, rheumatic heart disease, viral myocarditis, and heart rhythm disorders, especially those accompanied by heart failure. Excessive strain can increase the burden on the heart, exacerbate heart failure, lead to arrhythmias, and in severe cases, result in sudden death. Therefore, patients with structural heart disease must follow a doctor's guidance to routinely use effective medications for treatment, rest adequately, avoid overexertion, and maintain a low-fat, low-salt diet to minimize factors that increase cardiac load and prevent the occurrence of sudden death.

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Written by Xie Zhi Hong

Cardiology

52sec

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Why does cardiogenic sudden death cause pallor throughout the body?

Sudden cardiac death occurs due to heart thrombosis or heart failure caused by various reasons whereby the heart cannot supply blood, leading to death. Most people experience hypotensive shock, insufficient blood and oxygen supply to the body before dying, thus appearing pale, with low blood pressure, and even cyanosis, with cessation of breathing and heartbeat. Some individuals suffer from heart thrombus dislodging into the brain, causing cerebral arterial infarction. Such extensive cerebral infarctions can also lead to the cessation of heartbeat, resulting in insufficient blood and oxygen supply throughout the body, manifesting as pallor and cyanosis.

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Written by Li Qiang

Intensive Care Unit

1min 19sec

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The difference between cardiogenic shock and sudden cardiac death

Cardiogenic shock is caused by a decrease in cardiac contractile function, leading to reduced ejection, lowered blood pressure, and resulting in ischemia and hypoxia of tissue cells. It is due to the reduced contractile function of the heart, which may be caused by coronary issues such as coronary ischemia, or by severe arrhythmias such as severe ventricular tachycardia or fibrillation, or by acute heart failure. Cardiogenic sudden death occurs when cardiogenic shock progresses further, leading to the cessation of the heartbeat. The main difference between cardiogenic sudden death and cardiogenic shock is that during cardiogenic sudden death, the heartbeat has definitely stopped completely, or there is only ventricular fibrillation, at which point it is called cardiogenic sudden death. During cardiogenic shock, the heart still retains some contractile function, meaning the heart still has some autonomous beating capability. Compared to cardiogenic sudden death, it is still an early, reversible stage of cardiogenic sudden death. Once it progresses to cardiogenic sudden death, immediate cardiopulmonary resuscitation is necessary, and at this point, the mortality rate greatly increases.

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Written by Chen Guang Yin

Cardiology

46sec

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Precursors of cardiogenic sudden death during sleep

Before the onset of cardiac arrest during sleep, patients often exhibit symptoms of coronary heart disease such as chest tightness, shortness of breath, and palpitations. Often, these individuals do not pay enough attention to the symptoms, do not undergo timely medical examinations at a hospital, and consequently, there is a delay in the treatment of the condition. It is very unfortunate that sudden deaths occur during sleep, possibly due to fatigue, poor rest, and underlying heart disease, which then leads to cardiac arrest. The precursors of such events can vary from person to person; symptoms may include chest tightness and palpitations, among others. Therefore, it is important that we pay attention to these signs.

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Written by Li Hai Wen

Cardiology

1min

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What does sudden cardiac death mean?

Sudden cardiac death refers to the sudden mortality caused by heart diseases, and the reasons for sudden cardiac death primarily include the following aspects: First, structural heart diseases, such as coronary heart disease and acute myocardial infarction; acute myocardial infarction is currently the most common cause of sudden cardiac death. Second, certain ion channel diseases, such as Brugada syndrome, or long QT syndrome. These types of ion channel diseases often coincide with malignant ventricular arrhythmias, such as torsade de pointes ventricular tachycardia or ventricular fibrillation, thus leading to the occurrence of these fatal phenomena. Third, severe arrhythmias, such as severe bradycardia or ventricular tachycardia related to structural heart disease, often trigger malignant ventricular arrhythmias, leading to death.