Research by Boston Children's validates an innovative approach to mapping the heart's invisible conduction tissue during ...

This is called "AV dissociation" and occurs in complete heart block (a.k.a. 3rd degree heart block). In this situation, the P waves have their own rate (tachycardic here) and the QRS complex have ...

Is your heart racing because you’re in love or is it a sign of a more serious heart condition? A cardiologist explains how to spot the difference.

High-grade AV block, also known as advanced heart block, is a form of third-degree heart block. This occurs when AV dissociation is present; however, intermittently some sinus node action ...

Montpellier and Copenhagen have identified why some endurance athletes experience a heart rhythm disturbance called ‘heart block’. The University of Manchester-led study found that long-term exercise ...

He had been diagnosed with "a 2:1 block in my heart", George said, where the heart beats more slowly or with an abnormal rhythm because of a problem with the electrical pulses. It was "a pretty ...

The ruling came hours after the U.S. Court of Appeals for the District of Columbia Circuit lifted a block on the launch that it had enacted the day before, according to a separate filing (PDF).

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