Ventricular fibrillation

Introduction Ventricular fibrillation (referred to as ventricular fibrillation) is one of the common causes of sudden cardiac arrest. The ventricle delivers continuous, rapid, and even excitement more than 240 times per minute, called ventricular flutter. If the excitement of ventricular release is rapid and irregular, it is called ventricular fibrillation (ventricular fibrillation). The frequency of ventricular fibrillation can be between 250 and 600 beats per minute. The causes of ventricular fibrillation are both cardiogenic and non-cardiac. Common causes of cardiogenic ventricular fibrillation are coronary heart disease, especially acute myocardial ischemia; severe hypoxia, ischemia, pre-excitation syndrome with atrial fibrillation and extremely rapid ventricular rate are not common causes of cardiogenic ventricular fibrillation And surgery accidents, severe electrolyte and acid-base balance disorders, electric shock, drowning and drug poisoning or allergies.

Cause

The causes of ventricular fibrillation are both cardiogenic and non-cardiac. Common causes of cardiogenic ventricular fibrillation are coronary heart disease, especially acute myocardial ischemia; severe hypoxia, ischemia, pre-excitation syndrome with atrial fibrillation and extremely fast ventricular rate. Common causes of non-cardiac ventricular fibrillation include anesthesia and surgical accidents, severe electrolyte and acid-base balance disorders, electric shock, drowning, and drug poisoning or allergies.

an examination

Related inspection

ECG dynamic electrocardiogram (Holter monitoring)

ECG characteristics of ventricular fibrillation: The waveform, amplitude and frequency of ventricular fibrillation are extremely irregular, and P wave, QRS complex, ST segment and T wave cannot be identified, and the frequency is 150-300 beats/min.

The 1QRS-T wave disappears, and the ventricular fibrillation waves of different sizes and different shapes are often converted from the room flutter. The amplitude is >0.5 mV, which is called rough wave ventricular fibrillation.

There is no equipotential line between 2f-f.

3 The frequency is above 250 beats/min. Frequency >100 beats / min is called rapid ventricular fibrillation, frequency.

4 If there is a ventricular flutter wave, it is called impure ventricular fibrillation.

Differential diagnosis

Attention should be paid to distinguish between ventricular fibrillation caused by both cardiogenic and non-cardiac causes.

ECG characteristics of ventricular fibrillation

The 1QRS-T wave disappears, and the ventricular fibrillation waves of different sizes and different shapes are often converted from the room flutter. The amplitude is >0.5 mV, which is called rough wave ventricular fibrillation.

There is no equipotential line between 2f-f.

3 The frequency is above 250 beats/min. Frequency >100 beats / min is called rapid ventricular fibrillation, frequency.

4 If there is a ventricular flutter wave, it is called impure ventricular fibrillation.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.