Altered heart rate variability patterns preceding ventricular tachycardia

F. Lombardi

Research output: Contribution to journalArticlepeer-review


Implantable cardioverter-defibrillators have made it possible to analyze heart rate variability patterns just preceding episodes of ventricular tachycardia. Signs of sympathetic activation and of a reduced vagal modulation were indicated by shorter cardiac cycle lengths, lower total power, and a significantly increased low-frequency to high-frequency ratio. We also observed a sharper negative slope in the power-frequency relationship. Our findings support the concept that the minutes preceding the onset of ventricular tachycardia are characterized by changes in neural control mechanisms.

Original languageEnglish
Pages (from-to)35-38
Number of pages4
JournalCardiology Review
Issue number8
Publication statusPublished - 2001

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine


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