Arrhythmias and heart failure
Arrhythmia is due to abnormal sinus node excitement or excitement that occurs outside the sinus node. The excitatory conduction is slow, blocked, or conducted through abnormal channels, that is, the origin of heart activity and/or the frequency of conduction disorders that lead to heartbeats And (or) abnormal rhythm.
The clinical manifestations of hemodynamic changes of arrhythmia mainly depend on the nature, type, heart function and degree of influence on the hemodynamics of the arrhythmia, such as mild sinus bradycardia, sinus arrhythmia, and occasional atrial arrhythmia Pre-sexual contraction, first-degree atrioventricular block, etc. have little effect on hemodynamics, so there is no obvious clinical manifestation. More serious arrhythmia, such as sick sinus syndrome, rapid atrial fibrillation, paroxysmal supraventricular heartbeat Tachycardia, persistent ventricular tachycardia, etc., can cause palpitations, chest tightness, dizziness, hypotension, sweating, in severe cases, syncope, Al-S syndrome, and even sudden death, due to different types of arrhythmia, clinical manifestations Different, mainly in the following manifestations:
1. Insufficient blood supply to the coronary arteries
Various arrhythmias can cause a decrease in coronary blood flow. Although various arrhythmias can cause a decrease in coronary blood flow, they rarely cause myocardial ischemia. However, for patients with coronary heart disease, various arrhythmias can be induced Or aggravate myocardial ischemia, mainly manifested as angina pectoris, shortness of breath, peripheral vascular failure, acute heart failure, acute myocardial infarction, etc.
2. Insufficient blood supply to the cerebral arteries
Different arrhythmias have different effects on cerebral blood flow. For those with normal cerebrovascular vessels, the above-mentioned hemodynamic obstacles will not cause serious consequences. If cerebrovascular disease occurs, it can cause the insufficient blood supply to the brain, which manifests as dizziness, fatigue, blurred vision, temporary total blindness, and even aphasia, Transient or permanent brain damage manifestations such as paralysis, convulsions, and coma.
3. Insufficient blood supply to the renal arteries
After the occurrence of an arrhythmia, renal blood flow also decreases in different ways. The clinical manifestations include oliguria, proteinuria, and azotemia.
4. Insufficient blood supply to the mesenteric artery
When tachyarrhythmia occurs, blood flow is reduced, and mesenteric artery spasm can produce clinical manifestations of gastrointestinal ischemia, such as abdominal distension, abdominal pain, diarrhea, and even bleeding, ulcers, or paralysis.
5. Manifestations of cardiac insufficiency
Mainly cough, dyspnea, fatigue, fatigue, edema, etc.
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