FOURIER-ANALYSIS OF VENTRICULAR-FIBRILLATION OF VARIED ETIOLOGY

EJF Carlisle, JD Allen, George Kernohan, JMCC Anderson, AAJ Adgey

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Abstract

Fast Fourier Transform analysis was used to study ventricular fibrillation induced by several different methods in 43 greyhounds anaesthetized with sodium pentobarbitone. The dominant frequency at the body surface of ventricular fibrillation induced electrically in non-ischaemic hearts was initially 9-9 ±0-7 Hz, remained above 9 Hz for 70 s and then rapidly fell to 5 Hz. The dominant frequency of ventricular fibrillation induced by acute occlusion (initially 12-3 ± 0-2 Hz), or by reperfusion (12-2 + 0-4 Hz) of the anterior descending branch of the left coronary artery, showed a similar time-course. However, ventricular fibrillation induced by administration of potassium (4-8±0-8 Hz) or ouabain (7-1 ± 11 Hz) was significantly slower. Fibrillation recordedfrom the endocardium of the heart initially showed a similar dominant frequency to that recorded at the body surface, but there was no significant fall in frequency over 3-3 mins. There was little difference in the time-course of fibrillation in the non-ischaemic heart recorded directly from the epicardium or from a surface lead. These findings may be of relevance to the poor response to DC countershock after prolonged ventricular fibrillation, hyperkalaemia or cardiac glycosides.
LanguageEnglish
Pages173-181
JournalEuropean Heart Journal
Volume11
Issue number2
Publication statusPublished - Feb 1990

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Ventricular Fibrillation
Fourier Analysis
Endocardium
Cardiac Glycosides
Hyperkalemia
Pericardium
Ouabain
Pentobarbital
Reperfusion
Coronary Vessels
Potassium
Sodium

Cite this

Carlisle, EJF., Allen, JD., Kernohan, G., Anderson, JMCC., & Adgey, AAJ. (1990). FOURIER-ANALYSIS OF VENTRICULAR-FIBRILLATION OF VARIED ETIOLOGY. European Heart Journal, 11(2), 173-181.
Carlisle, EJF ; Allen, JD ; Kernohan, George ; Anderson, JMCC ; Adgey, AAJ. / FOURIER-ANALYSIS OF VENTRICULAR-FIBRILLATION OF VARIED ETIOLOGY. In: European Heart Journal. 1990 ; Vol. 11, No. 2. pp. 173-181.
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Carlisle, EJF, Allen, JD, Kernohan, G, Anderson, JMCC & Adgey, AAJ 1990, 'FOURIER-ANALYSIS OF VENTRICULAR-FIBRILLATION OF VARIED ETIOLOGY', European Heart Journal, vol. 11, no. 2, pp. 173-181.

FOURIER-ANALYSIS OF VENTRICULAR-FIBRILLATION OF VARIED ETIOLOGY. / Carlisle, EJF; Allen, JD; Kernohan, George; Anderson, JMCC; Adgey, AAJ.

In: European Heart Journal, Vol. 11, No. 2, 02.1990, p. 173-181.

Research output: Contribution to journalArticle

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AU - Allen, JD

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AU - Adgey, AAJ

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N2 - Fast Fourier Transform analysis was used to study ventricular fibrillation induced by several different methods in 43 greyhounds anaesthetized with sodium pentobarbitone. The dominant frequency at the body surface of ventricular fibrillation induced electrically in non-ischaemic hearts was initially 9-9 ±0-7 Hz, remained above 9 Hz for 70 s and then rapidly fell to 5 Hz. The dominant frequency of ventricular fibrillation induced by acute occlusion (initially 12-3 ± 0-2 Hz), or by reperfusion (12-2 + 0-4 Hz) of the anterior descending branch of the left coronary artery, showed a similar time-course. However, ventricular fibrillation induced by administration of potassium (4-8±0-8 Hz) or ouabain (7-1 ± 11 Hz) was significantly slower. Fibrillation recordedfrom the endocardium of the heart initially showed a similar dominant frequency to that recorded at the body surface, but there was no significant fall in frequency over 3-3 mins. There was little difference in the time-course of fibrillation in the non-ischaemic heart recorded directly from the epicardium or from a surface lead. These findings may be of relevance to the poor response to DC countershock after prolonged ventricular fibrillation, hyperkalaemia or cardiac glycosides.

AB - Fast Fourier Transform analysis was used to study ventricular fibrillation induced by several different methods in 43 greyhounds anaesthetized with sodium pentobarbitone. The dominant frequency at the body surface of ventricular fibrillation induced electrically in non-ischaemic hearts was initially 9-9 ±0-7 Hz, remained above 9 Hz for 70 s and then rapidly fell to 5 Hz. The dominant frequency of ventricular fibrillation induced by acute occlusion (initially 12-3 ± 0-2 Hz), or by reperfusion (12-2 + 0-4 Hz) of the anterior descending branch of the left coronary artery, showed a similar time-course. However, ventricular fibrillation induced by administration of potassium (4-8±0-8 Hz) or ouabain (7-1 ± 11 Hz) was significantly slower. Fibrillation recordedfrom the endocardium of the heart initially showed a similar dominant frequency to that recorded at the body surface, but there was no significant fall in frequency over 3-3 mins. There was little difference in the time-course of fibrillation in the non-ischaemic heart recorded directly from the epicardium or from a surface lead. These findings may be of relevance to the poor response to DC countershock after prolonged ventricular fibrillation, hyperkalaemia or cardiac glycosides.

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Carlisle EJF, Allen JD, Kernohan G, Anderson JMCC, Adgey AAJ. FOURIER-ANALYSIS OF VENTRICULAR-FIBRILLATION OF VARIED ETIOLOGY. European Heart Journal. 1990 Feb;11(2):173-181.