The effects of orthostasis on the ventricular-evoked response
| Autor: | G Krahé-Fritsch, M Krakau, F Saborowski, K Wallbrueck, M Schaldach |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Male
medicine.medical_specialty Pacemaker Artificial Supine position Heart block Hemodynamics Dizziness Sensitivity and Specificity Tilt table test Heart Rate Tilt-Table Test Physiology (medical) Internal medicine Heart rate medicine Repolarization Humans Evoked Potentials Aged Monitoring Physiologic Probability medicine.diagnostic_test business.industry Middle Aged medicine.disease Blood pressure Heart Block Anesthesia cardiovascular system Cardiology Linear Models Female Cardiology and Cardiovascular Medicine business Atrioventricular block Follow-Up Studies |
| Zdroj: | Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology. 2(4) |
| ISSN: | 1099-5129 |
| Popis: | Aims The effects of orthostasis on the morphology of the ventricular-evoked response were investigated. Methods and Results Seven patients (five females; 74·94·6 years) with second- or third-degree atrioventricular block received DDD pacemakers Physios CTM 01 with fractal-coated ventricular leads (both Biotronik, Germany). At their 3-month follow-up sessions, these patients underwent tilt-table tests. Heart rate, mean arterial blood pressure and ventricular-evoked response were measured continuously. Signals were averaged over 15 consecutive beats. Coefficients of correlation between selected ventricular-evoked response parameters and heart rate or mean arterial blood pressure were calculated. Tilt upwards affected heart rate, mean arterial blood pressure and ventricular-evoked response extremes showed non-uniform, patient-specific changes that were not related directly to other parameters. Heart rates significantly increased in six patients following tilt upwards. For all patients, ventricular-evoked response plateau amplitudes immediately increased with tilt upwards. Furthermore, repolarization times correlated with changes in heart rates (r=0·78). Conclusions Monitoring of the ventricular-evoked response during tilt-table testing revealed that the plateau amplitude of the ventricular-evoked response depends on the patient’s position; ventricular-evoked response increased in the upright position and decreased in the supine position. Furthermore, repolarization time and heart rate correlated inversely; higher heart rates resulted in a shortening of the ventricular-evoked response. (Europace 2000; 2: 333–338) |
| Databáze: | OpenAIRE |
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