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Ventricular Premature Beats: Difference between revisions
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[[Image:Rhythm_bigemini.png|thumb|Bigemini: every sinus beat is followed by a ventricular extrasystole]] | [[Image:Rhythm_bigemini.png|thumb|Bigemini: every sinus beat is followed by a ventricular extrasystole]] | ||
A VPB is an [[Ectopic Beats|ectopic beat]] that origins from the ventricles. VPBs are hardly conducted by the specialised conduction system and therefore are broad. The QRS width is at least > 0.12 seconds, but often very broad at around 0.16-0.20 seconds. The VPB is followed by a [[Ectopic Beats|compensatory pause]]. | A VPB is an [[Ectopic Beats|ectopic beat]] that origins from the ventricles. VPBs are hardly conducted by the specialised conduction system and therefore are broad. The QRS width is at least > 0.12 seconds, but often very broad at around 0.16-0.20 seconds. The VPB is usualle followed by a [[Ectopic Beats|compensatory pause]], however this can be absent in the presence of retrograde conduction through the av-node. | ||
Causes: e.g. ischemia, hypoxia, old scar tissue, idiopathic. 50% of healthy men have sporadic VPBs. | Causes: e.g. ischemia, hypoxia, old scar tissue, idiopathic. 50% of healthy men have sporadic VPBs. | ||