Luigi Luciani and the Earliest Graphic Demonstration of Wenckebach Periodicity by Charles B. Upshaw, and Mark E. Silverman Circulation Volume 101(22):2662-2668.

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Presentation transcript:

Luigi Luciani and the Earliest Graphic Demonstration of Wenckebach Periodicity by Charles B. Upshaw, and Mark E. Silverman Circulation Volume 101(22): June 6, 2000 Copyright © American Heart Association, Inc. All rights reserved.

Luigi Luciani. Charles B. Upshaw, Jr, and Mark E. Silverman Circulation. 2000;101: Copyright © American Heart Association, Inc. All rights reserved.

Tonographic apparatus for recording ventricular beats of the heart when it is isolated and cannula are attached to it at different heights of atria. a indicates reservoir of serum or other nutrient fluid, which is closed by Mariotte’s method to keep filling and pressure of heart constant; b, valvular apparatus, which is closed during systole; c, tap for interrupting communication between reservoir and heart; d, cannula to which heart is tied and fixed to apparatus; e, small vessel full of serum, which can be raised during the experiment to bathe outside of heart; f, small mercury manometer, provided with float, which records ventricular beats of heart on revolving cylinder with glass pen (g). Charles B. Upshaw, Jr, and Mark E. Silverman Circulation. 2000;101: Copyright © American Heart Association, Inc. All rights reserved.

Paroxysmal phase of ventricular pulse activity forms an ascending staircase, as shown by frog heart filled with sheep serum and tied at AV groove, immediately after attachment to tonographic apparatus. Charles B. Upshaw, Jr, and Mark E. Silverman Circulation. 2000;101: Copyright © American Heart Association, Inc. All rights reserved.

Periodic ventricular rhythm shown by frog heart tied at atria 2 mm above AV groove, filled with rabbit serum, and attached to tonographic apparatus. Charles B. Upshaw, Jr, and Mark E. Silverman Circulation. 2000;101: Copyright © American Heart Association, Inc. All rights reserved.

Crisis phase of ventricular pulse activity in frog heart tied 3 mm above AV groove and filled with pig serum. Charles B. Upshaw, Jr, and Mark E. Silverman Circulation. 2000;101: Copyright © American Heart Association, Inc. All rights reserved.

Ventricular pulse waves of group E (with pause) and of group F as taken from Figure 4, which was enlarged 8×. Charles B. Upshaw, Jr, and Mark E. Silverman Circulation. 2000;101: Copyright © American Heart Association, Inc. All rights reserved.