Catheterization of the Left Ventricle in Man

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Abstract
Simultaneous catheterization of the left and right ventricles was performed in a case of right bundle branch block. It was thought that in right bundle branch block the polarity of the initial deflection of the potentials obtained in the left ventricular cavity could be studied without interference of those contributed by the right ventricular cavity. A description of the technic employed is given. The results confirm those obtained in dogs. There is initial negativity of the potentials obtained within the left ventricular cavity.
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