Temporary Atrial Electrode for the Treatment of Supraventricular Tachycardia After Cardiac Operations

Mehmanesh, Hormoz; Lange, Rüdiger; Hagl, S.

doi:10.1016/s0003-4975(97)01350-7

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…8) were loosely fixed at the right and left atrium. These electrodes were chosen because safe cardioversion/defibrillation with low shock energies and a minimum of shocks is unlikely to succeed using conventional epicardial paddles, Epicardial defibrillation was chosen because this configuration is supposed to be associated with the lowest energy requirements.Â trial fibrillation (AF) was induced with an 50 Hz-AC-fibrillator.…”

Section: Methodsmentioning

confidence: 99%

Aortic Input Impedance and Ventriculoarterial Coupling Following Cardioversion/Defibrillation

Bauernschmitt

Mehmanesh

Schulz³

et al. 1999

Pacing Clinical Electrophis

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Defibrillation shocks are commonly used after cardiac surgery or during defibrillator implantation. The hemodynamic consequences of countershocks on circulatory dynamics are not completely understood, and there is a lack of information concerning the effects on ventriculoarterial interaction. The study presented here was performed to assess the influence of defibrillation shocks on arterial hemodynamics and ventriculoarterial coupling. Eight mongrel dogs (weight 15-18 kg) were anesthetized and median thoracotomy was performed. Pressure in the ascending aorta and the left ventricle and flow in the ascending aorta were continuously monitored. After induction of atrial or ventricular fibrillation, termination was achieved by epicardial low energy shocks (atrium, 3J; ventricle, 51). In an additional attempt ventricular fibrillation was terminated by a high energy shock (34J). Aortic input impedance was calculated by fast-Fourier-transformation of aortic flow and pressure signals, while ventriculoarterial coupling was expressed by the ratio of aortic and ventricular end systolic elastance (Ea/Ees). Defibrillation by low energy shocks of atrial or ventricular fibrillation did not result in changes of the aortic impedance spectrum, and ventriculoarterial coupling remained unaltered compared to control conditions. High energy defibrillation, however, resulted in a marked rise in total peripheral resistance (P < 0.03). The ratio of Ea/Ees increased significantly (P < 0.005). These effects were reversible within 15 minutes. Low energy defibrillation does not alter arterial hemodynamics and ventriculoarterial coupling in this experimental setup. High energy defibrillation, however, results in a temporary increase of ventricular load. This finding may be of particular interest in patients with poor left ventricular function.

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Section: Methodsmentioning

confidence: 99%

Aortic Input Impedance and Ventriculoarterial Coupling Following Cardioversion/Defibrillation

Bauernschmitt

Mehmanesh

Schulz³

et al. 1999

Pacing Clinical Electrophis

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“…Wir haben deshalb nach alternativen Möglichkeiten gesucht, um rezidivierende hochenergetische externe Defibrillationen vermeiden zu können. Aus diesem Grund haben wir verschiedene interne, temporär zu applizierende ventrikuläre Elektroden entworfen und getestet, die eine niederenergetische Terminierung von atrialen ventrikuläre Tachyarrhythmien ermöglichen [34]. Die hier vorgestellte Elektrode unterscheidet sich von den bisherigen Prototypen: Sie ist einerseits sowohl atrial als auch ventrikulär anwendbar und andererseits komplett transkutan explantierbar.…”

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Temporäre anpaßbare Defibrillationselektrode: Ein alternatives Verfahren zur Behandlung von postoperativen Rhythmusstörungen nach Herzoperationen

Mehmanesh

Mieck²,

Bauernschmitt³

et al. 1999

Anästhesiol Intensivmed Notfallmed Schmerzther

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Atrial Fibrillation After Heart Surgery: How to Identify and Protect Predisposed Patients?

Zussa

Polesel

2000

Cardiac Arrhythmias 1999 - Vol.1

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Temporary Atrial Electrode for the Treatment of Supraventricular Tachycardia After Cardiac Operations

Cited by 8 publications

References 22 publications

Aortic Input Impedance and Ventriculoarterial Coupling Following Cardioversion/Defibrillation

Aortic Input Impedance and Ventriculoarterial Coupling Following Cardioversion/Defibrillation

Temporäre anpaßbare Defibrillationselektrode: Ein alternatives Verfahren zur Behandlung von postoperativen Rhythmusstörungen nach Herzoperationen

Atrial Fibrillation After Heart Surgery: How to Identify and Protect Predisposed Patients?

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