Sinus tachycardia is recognized on an ECG with a normal upright P wave in lead II preceding every QRS complex. This indicates that the pacemaker is coming from the sinus node and not elsewhere in ...

Ventricular tachycardia can occur with many variations of the QRS morphology, depending on where the arrhythmia originates, which sometimes makes diagnosis on ECG challenging. Below are two ...

Tachycardia is the medical term for an elevated resting heart rate, which can occur when your heart beats more than 100 times per minute. Several factors can cause your heart to beat too fast ...