12/20/2023 0 Comments Split second soundThe widened split is due to a sharp initial movement of A 2 toward the R wave of the electrocardiogram while the R-P 2 interval remains relatively fixed.Ĭlinically, the split appears to be unusual in that it occurs right at the onset of inspiration and lasts for one or two beats only, but it is only by phonocardiography that the predominant movement of A 2 can be established. An unusual form of inspiratory widening of the split second sound is reported in 4 cases of constrictive pericarditis with pulsus paradoxus.
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