Dr. Steve Hammill answers the question: 'What Is Sinus Tachycardia?' — -- Question: What is sinus tachycardia, and is it something that should be treated? Answer :Sinus tachycardia is the heart ...

In this situation, the P-wave morphology in leads V1 and II plays a decisive role. The P wave of sinus rhythm is biphasic (initially positive, then negative) in V1, with or without left atrial ...

What is the etiology of sinus tachycardia (90-100 beats per minute) in a 70-year-old man who has normal blood pressure but is taking quinidine gluconate for atrial fibrillation? What is the ...

Sinus tachycardia is indicated on ECG with a normal upright P wave in lead II preceding every QRS complex (indicating that the pacemaker is coming from the sinus node and not elsewhere in the atria) ...

Q: I was feeling lightheaded and having palpitations, went to the ER and was admitted to the ICU. They said I had a run of ventricular tachycardia. What is this? A: The heartbeat is controlled by ...

Q: I was feeling lightheaded and having palpitations, went to the ER and was admitted me to the ICU. They said I had a run of ventricular tachycardia. What is this? A: The heartbeat is controlled by ...

Postural orthostatic tachycardia syndrome (POTS) is a common heterogeneous form of cardiovascular autonomic dysregulation. The exact cause of POTS remains unclear. Patients typically complain of ...