Cardiac Pacing pp 677-682 | Cite as

Intraoperative Spectral Analysis of Ventricular Potentials During Sinus Rhythm and Ventricular Tachycardia

  • S. Saksena
  • W. Craelius
  • S. M. Hussain
  • D. Pantopoulos
  • V. Parsonnet


We determined the frequency spectra of ventricular potentials obtained in patients with recurrent sustained ventricular tachycardia (VT) undergoing cardiac electrosurgery. Recordings were obtained from direct myocardial bipolar electrodes inserted at locations distant from the site of arrhythmogenesis. Analyses of standard filtered (30–500 Hz), and wideband (0.5–2500 Hz) recordings were performed using a FFT analyser during sinus rhythm and VT.

In eleven patients studied, the spectra of standard recordings during sinus rhythm consisted of a broad peak having a center frequency between 20 and 30 Hz, with an average of 24 ± 4 Hz. Spectra of wideband recordings was substantially lower due to the large T wave component. During VT the spectral peaks of ventricular potentials shifted to lower frequencies, with an average for standard recordings of 18 ± 5 Hz. The observations are consistent with a reduction of myocardial conduction velocity during VT or delayed activation at local or distant sites.


Ventricular Tachycardia Sinus Rhythm Conduction Velocity Beth Israel Medical Ventricular Potential 
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  1. 1.
    Wit AL, Allessie MA, Bonke FIM, Lammers W, Smeets J, Fenoglio JJ: Electrophysiologic mapping to determine the mechanism of experimental ventricular tachycardia initiated by premature impulses. Am J Cardiol 1981; 49: 166–185.CrossRefGoogle Scholar
  2. 2.
    Ideker RE, Smith WM, Wallace AG, Kasell J, Harrison LA, Klein GJ, Kinicki RE, Gallagher JJ: A computerized method for the rapid display of ventricular activation during the intraoperative study of arrhythmias. Circulation, 1979; 59: 449–458.CrossRefPubMedGoogle Scholar
  3. 3.
    Josephson ME, Horowitz LN, Farshidi A, Spear JF, Kastor JA, Moore EN: Recurrent sustained ventricular tachycardia. 2. Endocardial mapping. Circulation, 1978; 57: 440–447.CrossRefPubMedGoogle Scholar
  4. 4.
    EI-Sherif N, Scherlag BJ, Lazzara R, Hope RR: Reentrant ventricular arrhythmias in the late myocardial infarction period. 2. Patterns of initiation and termination of reentry. Circulation, 1977; 55:702–718.CrossRefGoogle Scholar
  5. 5.
    Waldo AL: Seminar on surgical therapy for ventricular arrhythmias. Amer J Cardiol 1981; 49: 163–165.CrossRefGoogle Scholar
  6. 6.
    Spach MS, Miller WT, Dolber PC, Kootset, JM, Sommer JR, Mosher CE: The functional role of structural complexities in the propagation of depolarization in the atrium of the dog. Circ Res 1982; 50: 175–191.CrossRefPubMedGoogle Scholar
  7. 7.
    Myers GH, Kresh YM, Parsonnet V: Characteristics of intracardiac electrograms. Pace 1978; 1: 90–97.CrossRefPubMedGoogle Scholar
  8. 8.
    Kleinert M, Elmquist H, Strandberg H: Spectral properties of atrial and ventricular endocardial signals. Pace 1979; 2: 11–19.CrossRefPubMedGoogle Scholar
  9. 9.
    Stulen FB, DeLuca CJ: Frequency parameters of the myoelectric signal as a measure of muscle conduction velocity. IEEE Trans on Biomed Engr 1981; 28: 515–523.CrossRefGoogle Scholar

Copyright information

© Dr. Dietrich Steinkopff Verlag, GmbH & Co. KG, Darmstadt 1983

Authors and Affiliations

  • S. Saksena
    • 1
  • W. Craelius
  • S. M. Hussain
  • D. Pantopoulos
  • V. Parsonnet
  1. 1.Cardiac ElectrophysiologyNewark Beth Israel Medical CenterNewarkUSA

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