| Author/Editor | Geršak, Borut; Trobec, Roman; Avbelj, Viktor | |
| Title | Conduction changes after partial left ventriculectomy | |
| Type | članek | |
| Source | In: Kawaguchi AT, Linde LM, editors. Partial left ventriculectomy: recent evolution for safe and effective application. Proceedings of the 2nd international symposium on Partial Left Ventriculectomy; 1998 Dec 12; Tokyo. Amsterdam: Elsevier, | |
| Publication year | 1999 | |
| Volume | str. 99-111 | |
| Language | eng | |
| Abstract | Background. To demonstrate cardiac electrophysiologic changes in patients where partial left ventriculectomy (PLV) was performed, multichannel ECG (MECG) measurements were used. PLV was originally introduction 2 years ago as a new and revolutionary surgical approach to treat patients with end-stage cardiac disease. Methods: MECG measurements were performed simultaneously using two different electrode positioning protocols (from 35 (L-protocol) and 31 (E-protocol), measuring points on the front of the chest respectively) allowing the study of ECG shanges in two different ways: first with the classic 12-channel ECG and second with the body surface potential mapping (BSPM). The aforementioned operation was performed on 11 patients in Brazil. The same electrode positions were used for all five measurements: prior to PLV and on the 2nd, 3rd, 4th and 5th postoperative days. MECG softwere, along with other specialized software was used to show and calculate ECG signals from different parts of the chest, including all the 12 standard channels from the classic ECG. The BSP maps were generated from a single beat as previously described. Results: All ST40ms isointegral maps of patients who were candidates for PLV show the great positivity (ST elevation) over the anterior apsect of the heart and a large negativity (ST depression) over the lateral and posterior aspect of the heart before operation. All has normal coronary angiography data. After operation, normalization of ST elevation over the anterior, lateral and posteior aspect of the heart occurs, leaving great positivity over the excised area of the heart. Cardiac conduction changes were demonstrated with computerized animation of the complete cardiac cycle before and after PLV. The area of the left ventricle where PLV took place was carefully analyzed for any repolarization changes and variations in Q-T interval. (Abstract truncated at 2000 characters). | |
| Descriptors | ARRHYTHMIA ELECTROCARDIOGRAPHY HEART VENTRICLE BODY SURFACE POTENTIAL MAPPING HEART CONDUCTION SYSTEM POSTOPERATIVE PERIOD |