Final answer:
Ventricular tachycardia (Vtach) is a rapid heart rate originating from the ventricles, diagnosed with an ECG showing abnormal QRS patterns. It's a type of ventricular arrhythmia that can impact blood circulation due to rapid contractions.
Step-by-step explanation:
Ventricular tachycardia (Vtach) is a type of ventricular arrhythmia, which is one of the four main groups of arrhythmias. It is characterized by a rapid heart rate that originates from the ventricles, which are the lower chambers of the heart. Arrhythmias are the result of problems with the heart’s electrical conduction system. An electrocardiogram (ECG) can help diagnose ventricular tachycardia with a typical pattern showing an abnormal QRS complex. During ventricular systole, if the heart contracts too rapidly, it can result in inadequate time for the heart to fill with blood, potentially leading to less efficient blood circulation.