Archives of internal medicine . 338 THE ARCHIVES OF IXTEKXAL ilEDICJXE Tracings 2] and 22, April 29, 1909: Be marl-ably Prolouged ConduriionTime; Occasional Halving of ilie Bate The auricles are contracting regular!}- at about 90 per minuie. Theventricular pauses fall into two sets, one of which is approximately twiceas long as the other. The long pauses are from to seconds short are from to in length. During the period ofrapid ventricular action every auricular systole is followed by ventricularS3stole with an a-c time which is from to second in
Archives of internal medicine . 338 THE ARCHIVES OF IXTEKXAL ilEDICJXE Tracings 2] and 22, April 29, 1909: Be marl-ably Prolouged ConduriionTime; Occasional Halving of ilie Bate The auricles are contracting regular!}- at about 90 per minuie. Theventricular pauses fall into two sets, one of which is approximately twiceas long as the other. The long pauses are from to seconds short are from to in length. During the period ofrapid ventricular action every auricular systole is followed by ventricularS3stole with an a-c time which is from to second in the period of slow ventricular rate there is a 2 to 1 other auricular S3stole is blocked and the a-c time varies to second. The shortening of the a-c time is probably due to thegreater opportunity for the conduction fibers to regain their functionalpower during long pauses. During the shorter pauses the conductiontime is so long that the a wave of the venous pulse follows immediatelyafter the pr
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