The correct diagnosis is sinus rhythm and atrial bigeminy (Figure 2). The rhythm appears to be regular; however, there is slight irregularity, ie, the RR intervals are 0.40 sec (⨅) alternating with ...

A P wave (↓) occurs prematurely after each sinus beat (atrial bigeminy). These P waves occur at a time when the AV conduction system is refractory, and they are blocked (nonconducted atrial bigeminy).

You are able to gift 5 more articles this month. Anyone can access the link you share with no account required. Learn more. DEAR DR. ROACH: Several months ago, I developed a case of a bigeminy ...

A premature atrial contraction (PAC) occurs when a focus in the atrium (not the SA node), generates an action potential before the next scheduled SA node action potential. There are four main ...

A 51 year old female has been experiencing intermittent palpitations. She was diagnosed with hypertension 15 years ago. She has not had any pre-syncopal or syncopal episodes. She denies any chest ...

Dear Dr. Roach: Several months ago, I developed a case of a bigeminy heartbeat. My cardiologist prescribed metoprolol. At about the same time, I had reduced my intake of magnesium from about 50% of ...