Incidence and Significance of Chronotropic Incompetence in Patients with Indications for Primary Pacemaker Implantation or Pacemaker Replacement
| Autor: | Eliska Sovova, Vlastimil Doupal, Ladislav Lubena, Jan Lukl |
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| Rok vydání: | 1999 |
| Předmět: |
Male
Chronotropic Pacemaker Artificial medicine.medical_specialty Chronotropic incompetence Sick sinus syndrome Pacemaker replacement Heart Rate Internal medicine Atrial Fibrillation Heart rate Humans Medicine In patient Prospective Studies Prospective cohort study Aged Sick Sinus Syndrome business.industry Atrial fibrillation General Medicine medicine.disease Heart Block Anesthesia Exercise Test Cardiology Female Cardiology and Cardiovascular Medicine business |
| Zdroj: | Pacing and Clinical Electrophysiology. 22:1284-1291 |
| ISSN: | 1540-8159 0147-8389 |
| DOI: | 10.1111/j.1540-8159.1999.tb00621.x |
| Popis: | This prospective study was undertaken to evaluate the incidence and significance of chronotropic incompetence in 211 patients [age 71.1 6 10.6 years (mean 6 SD)] by means of maximum exercise test in order to determine the indication for rate-responsive pacing before primary pacemaker implantation (147 patients) or pacemaker replacement (64 patients). There were 112 (53%) patients with second- or third-degree AV block, 63 (30%) with sick sinus syndrome, and 36 (17%) with chronic atrial fibrillation. Chronotropic incompetence was defined as maximum heart rate lower than age-adjusted norm calculated by the formula: 0.7x(220 - age) and its significance as the difference between the two rates. The overall incidence of chronotropic incompetence was 42%. The incidence was significantly higher in patients with atrial fibrillation (67%, P |
| Databáze: | OpenAIRE |
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