1. Autonomic Nervous System Modulation before the Onset of Sustained Atrioventricular Nodal Reentry Tachycardia
- Author
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Anna Rago, Gerardo Nigro, Raffaele Calabrò, Annabella De Chiara, Raffaele Chianese, Vincenzo Russo, Nadia Della Cioppa, Donatella Manfredi, Nigro, Gerardo, Russo, V, DE CHIARA, A, Rago, A, Cioppa, Nd, Chianese, R, Manfredi, D, and Calabro', Raffaele
- Subjects
Adult ,Male ,Tachycardia ,medicine.medical_specialty ,Heart disease ,Nodal disease ,Heart Rate ,Physiology (medical) ,Internal medicine ,Heart rate ,nodal reentry tachycardia ,Humans ,Tachycardia, Atrioventricular Nodal Reentry ,Medicine ,Heart rate variability ,Circadian rhythm ,Retrospective Studies ,medicine.diagnostic_test ,business.industry ,autonomic nervous system ,heart rate variability ,Original Articles ,General Medicine ,medicine.disease ,Circadian Rhythm ,Autonomic nervous system ,Anesthesia ,Electrocardiography, Ambulatory ,Cardiology ,Female ,medicine.symptom ,Electrophysiologic Techniques, Cardiac ,Cardiology and Cardiovascular Medicine ,business ,Electrocardiography - Abstract
Introduction: Our study was designed to analyze dynamic changes in autonomic tone before the onset of typical sustained atrioventricular nodal reentry tachycardia (AVNRT) in a large group of patients without structural heart disease. Materials and Methods: Twenty-four-hour Holter tapes from 42 consecutive patients (27 men and 15 women; aged 30 ± 21 years) with several episodes of sustained typical AVNRT were analyzed. The diagnosis was validated by transesophageal electrophysiological study. The time-domain calculated parameters were SDNN, SDANN, rMSSD, pNN50; the frequency-domain parameters were low-frequency power (LF, 0.04–0.15 Hz), high-frequency power (HF, 0.15–0.40 Hz), very low-frequency power (VLF, 0.008 to 0.04 Hz) and LF/HF. The mean values in the hour before the onset of sustained AVNRT were compared with the mean values of 2 hours before and 1 hour after the onset of sustained AVNRT. Results: The mean SDNN, rMSSD, pNN50, HF were significantly decreased during the hour preceding the onset of AVNRT, when compared to the mean values observed during the time periods selected. Instead, the LF values and LF/HF were increased before the onset of sustained AVNRT. No significant change in the VLF and atrial ectopic beats were observed. Conclusion: This study suggests that sustained typical AVNRT episodes are preceded by increase in adrenergic drive. Ann Noninvasive Electrocardiol 2010;15(1):49–55
- Published
- 2010
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