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Bernard Boal

Publications and source records attributed to Bernard Boal.

3 recordsLinked to original sources
PubMed2006

"Sensing alternans" in a patient with a newly implanted pacemaker.

This report describes the case of an 80-year-old man with a history of coronary artery disease who presented with acute pericarditis secondary to pacemaker lead perforation of the ventricular wall 2 days after undergoing dual lead pacemaker implantation. The electrocardiogram revealed sinus rhythm with an intra-atrial conduction delay and intermittent failure of atrial sensing as evidenced by alternating atrial spikes in every other P wave. The noted pericardial effusion and the likely shifting of the atrial lead with each alternate beat caused the "sensing alternans" that was seen on the admission electrocardiogram.

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PubMedDate not supplied

The great escape: junctional escape-capture bigeminy.

Escape-capture bigeminy is a bigeminal rhythm in which each escape beat is followed by a captured beat. This dysrhythmia is very rare, because its manifestation requires the sinus interval to be longer than the escape interval. This is possible only with severe sinus nodal disease, where the intrinsic sinus rate is extremely low, or with a sinus rhythm associated with an accelerated junctional rhythm. The authors review the case of a 75-year-old man who presented with occasional dizziness and near-syncopal episodes. He was diagnosed with escape-capture bigeminy and subsequently underwent pacemaker placement.

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