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Sudden cardiac death
How to self-rescue from sudden cardiac death
Sudden cardiac death is now also a very critical illness often occurring in coronary heart disease. We frequently see news reports of sudden deaths at airports and public places. At such times, self-rescue is extremely difficult. Unless you have a history of coronary heart disease and carry medications with you, if you experience symptoms like chest tightness and shortness of breath, you could take these medications to help yourself. Otherwise, sudden cardiac death occurs abruptly, causing the heart to stop beating within a very short period, and the patient cannot self-rescue.
The difference between sudden cardiac death and myocardial infarction.
Sudden cardiac death refers to the sudden death of a patient caused by various heart diseases. The most common causes include malignant arrhythmias such as ventricular fibrillation and ventricular tachycardia, severe bradycardia, significant valvular dysfunction, or the sudden occlusion of the coronary arteries leading to death. Myocardial infarction, on the other hand, refers to the sudden cessation of blood supply to the heart vessels, causing myocardial death and leading to arrhythmias or valvular dysfunction, which presents a range of symptoms in patients. Myocardial infarction can result in death in 30% of patients, but with medical intervention, the mortality rate can significantly decrease. Therefore, in cases of sudden cardiac death, the patients are already deceased. However, the mortality rate from myocardial infarction under natural circumstances is relatively high, reaching 30%. With current medical interventions, the rate of mortality due to sudden cardiac death can be reduced to less than 10%.
Can cardiogenic sudden death cause vomiting?
Sudden cardiac death is commonly seen in three scenarios. The first scenario involves severe arrhythmias, such as ventricular tachycardia, ventricular fibrillation, or cardiac arrest, which do not cause vomiting. The second scenario is due to severe valvular dysfunction caused by acute myocardial infarction or valvular disease, which also generally does not cause vomiting. The third scenario concerns patients with severe cardiac diseases who have mural thrombi in their hearts. If a thrombus detaches, it can lead to fatal systemic embolism. For instance, if the thrombus travels to the cerebral arteries, it can cause cerebellar or cerebral artery occlusion, leading to brain herniation. This may result in symptoms such as headache, nausea, vomiting, and limb dysfunction. If it travels to the mesenteric artery, it can cause gastrointestinal pain and result in vomiting. Therefore, some cases of sudden cardiac death may cause vomiting.
Is there a difference between sudden cardiac death and myocardial infarction?
Sudden cardiac death refers to the death of patients caused by various reasons such as cardiac enlargement, ventricular aneurysm, cardiac valve dysfunction, arrhythmias, and cardiac infections. Myocardial infarction leading to myocardial death is just one type of sudden cardiac death, mainly due to insufficient cardiac blood supply, leading to arrhythmias, heart failure, shock, acute death caused by the formation of intracardiac thrombosis, or death caused by complications after a heart attack. Therefore, the range of sudden cardiac death is quite broad, including myocardial infarction.
How to rescue sudden cardiac death from cardiogenic heart disease?
Firstly, the rescue approach for cardiogenic sudden death is the same regardless of the cause, whether it is rheumatic heart disease, coronary heart disease, malignant arrhythmia, or any other reason. If cardiogenic sudden death occurs, the rescue method is the same, which is to urgently perform cardiopulmonary resuscitation (CPR). CPR includes chest compressions of at least 100 per minute, and these must be effectively carried out. Secondly, artificial respiration must be performed, at about fourteen to fifteen times per minute. These two measures are the primary measures in the rescue of cardiogenic sudden death caused by rheumatic heart disease.
Does sudden cardiac death have a relationship with hypertension?
Sudden cardiac death and hypertension are related, with the most common cause of sudden cardiac death being acute myocardial infarction, which leads to malignant arrhythmias, such as ventricular fibrillation, resulting in sudden cardiac death. In addition, severe aortic dissection can also cause sudden cardiac death, and hypertension is often an important cause of coronary heart disease, acute myocardial infarction, and aortic dissection. Long-term hypertension can lead to the occurrence of arteriosclerosis, resulting in the formation of arterial plaques or aneurysms, such as those occurring in the coronary arteries, causing coronary heart disease and myocardial infarction, or in the aorta, often leading to the formation of aortic aneurysms. When an aortic aneurysm ruptures, it can cause aortic dissection.
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.
Does sudden cardiac death relate to coronary heart disease?
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.
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.
Is sudden cardiac death an acute myocardial infarction?
Sudden cardiac death refers to a phenomenon where a variety of heart diseases cause acute death in patients, with the most common causes being malignant arrhythmias such as ventricular tachycardia, ventricular fibrillation, or severe bradycardia, primarily related to myocardial infarction. However, not all cases of sudden cardiac death are due to myocardial infarction; this condition generally accounts for about 70%. Other causes of sudden cardiac death include existing dilated cardiomyopathy, thyrotoxic cardiomyopathy, or severe terminal stenosis of the mitral or aortic valves, which can also lead to sudden cardiac death. Another scenario involves atrial fibrillation leading to atrial thrombosis, causing thrombus detachment and resulting in extensive cerebral infarction leading to sudden death; this is also classified as sudden cardiac death. Therefore, while the majority of sudden cardiac deaths are related to myocardial infarction and arrhythmias, not all sudden cardiac deaths are due to myocardial infarction.