Will aortic heart type cause bradycardia?

There are many heart disease patients in life, and their conditions are divided into many categories. A more common type of heart disease is called aortic heart type. In fact, to put it simply, it is myocardial hypertrophy. This phenomenon will increase the burden on the heart and increase the workload of the heart, which makes it particularly easy to cause bradycardia. It is quite dangerous in the long run. So what should we do if we have aortic heart type bradycardia?

Hypertrophic cardiomyopathy is characterized by myocardial hypertrophy. It can be divided into obstructive and non-obstructive according to whether there is obstruction in the left ventricular outflow tract. Hypertrophic cardiomyopathy with asymmetric ventricular septal hypertrophy leading to subaortic stenosis is called idiopathic hypertrophic subaortic stenosis (IHSS). The cause is unknown. Possible factors include:

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① Dyspnea: Severe dyspnea due to exertion, such as orthopnea or paroxysmal nocturnal dyspnea, is caused by decreased compliance of the hypertrophic myocardium, increased left ventricular end-diastolic pressure, and increased left atrial pressure, resulting in pulmonary congestion.

② Angina pectoris: Typical angina pectoris often occurs after exertion. Chest pain lasts for a long time. Using nitroglycerin sublingually is not only ineffective but can also aggravate the onset of angina pectoris. This may be due to the compression of the fine coronary arteries in the hypertrophic myocardium, insufficient myocardial blood supply, and increased oxygen demand due to myocardial hypertrophy.

③ Syncope and dizziness; they often occur during exertion. The mechanism of occurrence is unknown. It may be due to the decrease in left ventricular compliance. After exertion, the positive inotropic effect of the sympathetic nerves is enhanced, resulting in worse left ventricular compliance, less ventricular blood filling during diastole, aggravated left ventricular outflow tract obstruction, reduced stroke volume, and insufficient blood supply to the brain. It may also be due to overstimulation of the left ventricular baroreceptors, causing reflex vasodilation and decreased blood pressure. Syncope and dizziness may also occur when tachycardia or bradycardia occurs.

④ Palpitations: The patient feels that the heart beats strongly, especially when lying on the left side. This may be caused by arrhythmia or changes in heart function.