Cardiac arrest

Introduction Cardiac arrest means that the myocardium still has bioelectrical activity, and there is no effective mechanical function. There is a slow, very weak and incomplete "shrinkage" condition. There are intermittently wide, deformed, low amplitude QRS waves on the electrocardiogram. Groups, the frequency is more than 20 to 30 times per minute. At this time, the myocardium has no contraction and blood discharge function, and the heart sound is not heard when the heart is auscultated, and the peripheral arteries are not beaten. Cardiac arrest refers to the sudden termination of cardiac ejection function. The pathological and physiological mechanism leading to cardiac arrest, the most common is ventricular fibrillation, which is a kind of arrhythmia, accounting for about 20% of all coronary heart disease, and the mortality rate is high.

Cause

The sinus node can not produce impulses, so that the atrium or the whole heart is stopped. The electrocardiogram shows that there is no P wave and QRS wave for a long time, which will cause insufficient blood supply to the heart, making people feel chest tightness and panic. There are many reasons for this, such as innate (or genetic). There are also bad moods, depression, irritability, excessive thinking, and poor rest.

an examination

Related inspection

ECG dynamic electrocardiogram (Holter monitoring)

The clinical manifestations of cardiac arrest are:

1 heart sound disappears, pulse can not touch, blood pressure can not be measured.

2 sudden loss of consciousness, limb convulsions, cardiac arrest 5 to 10 seconds, patients with syncope, arrest for 15 to 20 seconds, sudden loss of consciousness, systemic convulsions, patients are coma.

3 breathing intermittent, sigh, then stop, more than 20 to 30 seconds after the arrest.

4 patients with cardiac arrest coma, occurred 30 seconds after cardiac arrest.

5 patients with cardiac arrest were mostly 30 to 60 seconds after cardiac arrest. After 1 to 2 minutes, the pupil was fixed, and various deep and shallow reflexes disappeared.

Differential diagnosis

Identification of ventricular quiescence and cardiac arrest (or whole heart arrest):

1. Ventricular quiescence occurs on the basis of high or third degree atrioventricular block, and cardiac arrest occurs in all kinds of fatal arrhythmias, various organic heart diseases and various diseases in the dying period, primary Sexual or secondary cardiac arrest, ventricular quiescence, etc.

2. The ventricle is stationary on the electrocardiogram with atrial P wave (P wave, P' wave, F wave or f wave) without the atrioventricular junction area and ventricular QRS wave, and the cardiac arrest on the electrocardiogram is for more than 2.7s. (a straight line).

3. The ventricular still has atrial contraction without ventricular contraction, and the cardiac arrest has no contraction in the atria and ventricles. However, the common point of both ventricular quiescence and cardiac arrest is that there is no electrical activity in the ventricle (no QRS waves), and there is no mechanical contraction of the ventricle, which leads to the termination of blood circulation, so the two are compared. They are the two most serious types of arrest, and some advocate the collectively referred to as cardiac arrest.

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