Transvalvular impedance (TVI) recording under electrical and pharmocological cardiac stimulation
| Autor: | M. Finesso, F. Di Gregorio, Aldo Morra, M G Bongiorni |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Chronotropic
Inotrope medicine.medical_specialty Pacemaker Artificial Cardiotonic Agents Epinephrine Swine Systole Blood Pressure Atrial Function Right Signal Electrocardiography Heart Rate Internal medicine medicine Electric Impedance Ventricular Pressure Waveform Animals Lead (electronics) Ouabain Fibrillation Cardiac cycle Equipment Safety business.industry Cardiac Pacing Artificial Reproducibility of Results Heart Signal Processing Computer-Assisted General Medicine Equipment Design Adrenergic Agonists Electric Stimulation medicine.anatomical_structure Ventricle Ventricular Fibrillation cardiovascular system Cardiology Ventricular Function Right Swine Miniature medicine.symptom Cardiology and Cardiovascular Medicine business Algorithms |
| Zdroj: | Pacing and clinical electrophysiology : PACE. 19(11 Pt 2) |
| ISSN: | 0147-8389 |
| Popis: | The cardiac electric impedance was recorded between right atrium and ventricle, throughout the cardiac cycle, by means of a tripolar single pass lead for VDD pacing. The transvalvular impedance signal (TVI) is a sharp periodic wave, with high signal-to-noise ratio, that is detected exclusively in the presence of cardiac mechanical activity. The minimum TVI value is attained during the atrial systole, the maximum at the end of ventricular systole. Different parameters of TVI waveform are affected by changes in the inotropic state, and could therefore be proposed as potential signals for new rate responsive algorithms based on the correlation between inotropic and chronotropic regulation. The signal might be used, moreover, for pacing and sensing validation in autoregulating pacemakers and for fibrillation recognition in ICDs. |
| Databáze: | OpenAIRE |
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