Recurrence of cardiac arrest after 14 years without ICD interventions: a VF cluster immediately after delivery

Knops, Paul; Jordaens, Luc

doi:10.1007/bf03086154

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…Knops and Jordaens reported a case of recurrence of cardiac arrest immediately after delivery. 34 This case suggests that a certain functional promoter is related with the recurrence of cardiac arrest. We presume that it might be the surge of the sympathetic nervous activity, which occurred recurrently.…”

Section: Main Results and Comparison With Previous Studiesmentioning

confidence: 91%

V-Shaped Trough in Autonomic Activity Is a Possible Precursor of Life-Threatening Cardiac Events

Osaka

Watanabe

Murata

et al. 2010

Circ J

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Background:No reliable precursor of sudden cardiac death is known. Methods and Results:Holter electrocardiograms of 34 patients experiencing a cardiac event (event group, 20 deaths) were compared with 191 controls (no event group). The event group included 25 patients with ventricular fibrillation or acute myocardial infarction (AMI), and 9 with cardiac arrest due to complete atrioventricular block. The logarithms were calculated of the moving average of 5 successive values for the low-frequency component (LF), the high-frequency component (HF), and the ratio LF/HF of heart rate variability: ln(LF), ln(HF) and ln(LF/HF). A V-shaped trough appeared in the curve of ln(LF/HF) [sV-trough] or ln(HF) [pV-trough] before such an event in 31 patients in the event group. The V-trough was marked by a small variation lasting 2 h, an abrupt descent lasting 30 min, and a sharp ascent for 40 min. An sV-trough was observed in 22 patients before the onset of ventricular fibrillation or AMI. A pV-trough was observed in all 9 patients before the onset of complete atrioventricular block. In the no event group, an sV-trough and a pV-trough were observed in 10 subjects (5%) and 20 subjects (10%), respectively. The positive predictive accuracy of an sV-trough for ventricular fibrillation or AMI and that of a pV-trough for complete atrioventricular block was 88% and 100%, respectively. Conclusions:A previously unidentified V-trough of autonomic activity is a potential precursor of lethal events. (Circ J 2010; 74: 1906 - 1915

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Section: Main Results and Comparison With Previous Studiesmentioning

confidence: 91%

V-Shaped Trough in Autonomic Activity Is a Possible Precursor of Life-Threatening Cardiac Events

Osaka

Watanabe

Murata

et al. 2010

Circ J

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“…There is a case report on the recurrence of cardiac arrest immediately after delivery 34 . It suggests that a certain functional promoter is related to the recurrence of cardiac arrest and might be a surge of SNA, which might occur…”

Section: Mathematical Model Of Hr Dynamicsmentioning

confidence: 99%

Sudden Cardiac Death from the Perspective of Nonlinear Dynamics

Osaka

2018

J Nippon Med Sch

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There are some reports that sympathetic nerve activity (SNA) shows a characteristic pattern a few hours before the onset of lethal ventricular arrhythmias. If so, it could be possible to predict sudden cardiac death a few hours in advance of its occurrence. Recently, we reported that a previously unidentified Vtrough of SNA is a potential precursor of lethal cardiac events by examining 24-hour ambulatory electrocardiograms in which such an event was recorded by chance. In contrast, the chaotic nature of heart rate variability has been noted recently from the viewpoint of nonlinear dynamics. This study models the hemodynamics, consisting of heart rate, SNA, and blood pressure (BP), by modifying a known chaotic electrical circuit, the Chua circuit. A V-trough of the SNA appears when the resistive element between the SNA and BP in the circuit is increased, which corresponds to the impaired regulation of BP by the SNA. This finding is consistent with an acknowledged finding that a depressed baroreflex (a re-

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“…[8][9][10][11][12][13][14] The cases were selected based on originality and potential interest to the reader. Topics of the case histories are electrophysiology and congenital heart disease.…”

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confidence: 99%

Case history: more than a beauty case!

Wall¹

2008

NHJL

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Recurrence of cardiac arrest after 14 years without ICD interventions: a VF cluster immediately after delivery

Cited by 5 publications

References 13 publications

V-Shaped Trough in Autonomic Activity Is a Possible Precursor of Life-Threatening Cardiac Events

V-Shaped Trough in Autonomic Activity Is a Possible Precursor of Life-Threatening Cardiac Events

Sudden Cardiac Death from the Perspective of Nonlinear Dynamics

Case history: more than a beauty case!

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