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Studies of ventricular fibrillation caused by electric shock: II. Cinematographic and electrocardiographic observations of the natural process in the dog's heart. Its inhibition by potassium and the revival of coordinated beats by calcium - PubMed

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Studies of ventricular fibrillation caused by electric shock: II. Cinematographic and electrocardiographic observations of the natural process in the dog's heart. Its inhibition by potassium and the revival of coordinated beats by calcium

Carl J Wiggers et al. Ann Noninvasive Electrocardiol. 2003 Jul.

No abstract available

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Figures

Figure 1
Figure 1

Aortic and left ventricular pressure curves and electrocardiogram (Lead II) showing the effects introducing ventricular fibrillation due to faradic excitation. 1 to 2—Initial tachysystole stage. 2 to 3—Stage of consecutive incoordination. Time 0.04 and 0.2 seconds.

Figure 2
Figure 2

Segments of electrocardiogram (Lead II) taken at various stages during the course of fibrillation (043), A, control; B, and C, Immediate effects; D, after thirty seconds; E, after 1 minute; F, after minute; G, after 2 minute; H, minute; I, after 16 minute; J, after 20 minute; K, after 21 minute. Time 0.04 and 0.2 seconds.

Figure 3
Figure 3

Segments of electrocardiogram (Lead II). showing the early stages of natural fibrillation, the effects of KCl and of revival following use of CaCl2 (O‐42). A, control and initial tachysystolic stage; B, coarse incoordination, minutes later; C, tremulous incoordination after 2 minutes; D, 2 minutes; after use of KCl; E, 12 minutes after; F, minutes; after; G, initial idioventricular beats, recorded 19 minutes after fibrillation first started; H, 30 minutes after record; H. Time 0.04 and 2 seconds.

Figure 4
Figure 4

Electrocardiograms (Lead II) showing mechanisms in recovery from fibrillation. Description in text. Time 0.02 seconds (O‐70. VI–XI).

Figure 5
Figure 5

Electrocardiograms (Lead II), showing mechanisms of recovery from a second fibrillation in the same dog. Time 0.02 seconds. Description in text (O‐70. XV–XX).

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References

    1. Wiggers, CJ . Am J Physiol February, 1930.
    1. Wiggers, CJ . Am J Physiol 80: 1, 1927.
    1. Wiggers CJ. Pressure Pulses in the Cardiovascular System. London/New York : Longmans, Green and Co., 1928,p. 146.

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