NCLEX RN Quiz # 999
NCLEX Examination.
Practice Question # 999.
nclex examination.
Ventricular fibrillation is a rapid but disorganized ventricular rhythm that causes ineffective quivering of the ventricles. There is no atrial activity seen on the ECG. Causes of ventricular fibrillation are the same as for VT; it may also result from untreated or unsuccessfully treated VT. Other causes include electrical shock and Brugada syndrome, in which the patient (frequently of Asian descent) has a structurally normal heart, few or no risk factors for coronary artery disease, and a family history of sudden cardiac death. Ventricular fibrillation has the following characteristics.
- Ventricular rate: Greater than 300 per minute
- Ventricular rhythm: Extremely irregular, without specific pattern
- QRS shape and duration: Irregular, undulating waves without recognizable QRS complexes