Unusual QRS Morphology Associated with Transvenous Pacemakers
| Autor: | Elieser Kaplinsky, Elio DiSegni, Bruno Beker, Herman O. Klein, Hadassa Dean, Pinhas Sareli |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
Pulmonary and Respiratory Medicine
Qrs morphology medicine.medical_specialty medicine.diagnostic_test business.industry Left bundle branch block Precordial examination Right bundle branch block Critical Care and Intensive Care Medicine medicine.disease Transvenous pacemakers QRS complex medicine.anatomical_structure Internal medicine Cardiology Medicine Intercostal space Cardiology and Cardiovascular Medicine business Electrocardiography |
| Zdroj: | Chest. 87:517-521 |
| ISSN: | 0012-3692 |
| DOI: | 10.1378/chest.87.4.517 |
| Popis: | Eleven patients with implanted pervenous pacemakers were found to have unusual QRS morphology resembling right bundle branch block (RBBB) on the 12-lead electrocardiogram. In nine patients, the tip of the electrode catheter was established with certainty to be in the right ventricular apex. In eight of the nine, the standard leads showed a left bundle branch block pattern (LBBB), whereas only the precordial leads V 1 and V 2 resembled RBBB. In only one of the nine was the RBBB pattern also seen in the standard leads. In all nine, recording the precordial leads one intercostal space below the usual space eliminated the RBBB pattern in V 1 -V 2 and resulted in inscription of a QS complex, whereas recording the leads one space higher than usual enhanced the height of the R wave. This is explained by the marked superior and slight anterior orientation of the main QRS complex in right ventricular pacing. It is suggested that the pattern of RBBB in V 1 -V 2 +LBBB in lead 1 be named pseudo RBBB pattern since it does not represent left prior to right ventricular activation. |
| Databáze: | OpenAIRE |
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