Mechanisms in T-wave alternans caused by intraventricular block.


It is recognized that 2:1 intraventricular (IV) block can result in T-wave alternans but is usually assumed that it would also affect QRS waveform. Block in a local region is not, however, varied activation sequence of the same muscle mass because the blocked region is not activated and is not part of the mass that is activated in cycles without block. Also… (More)


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