TY  - CHAP
U1  - Konferenzveröffentlichung
A1  - Haltenberger, Anna
A1  - Heinke, Matthias
A1  - Ismer, Bruno
A1  - Kühnert, Helmut
A1  - Küthe, Friedhelm
A1  - Eisenträger, Daniela
A1  - Surber, Ralf
A1  - Prochnau, Dirk
A1  - Lorenz, Martin
A1  - Figulla, Hans Reiner
T1  - Transesophageal left cardiac electrocardiography for evaluation of interventricular and interatrial conduction delay before and after premature ventricular contraction in heart failure patients
T2  - Biomedical Engineering / Biomedizinische Technik
N2  - Introduction: Cardiac resynchronization therapy (CRT) with biventricular pacing is an established therapy for heart failure (HF) patients with sinus rhythm and ventricular desynchronisation. The aim of this study was to evaluate interventricular conduction delay (IVCD) and interatrial conduction delay (IACD) before and after premature ventricular contractions (PVC) in HF patients. 
Methods: 13 HF patients (age 68 ± 10 years; 2 females, 11 males) with New York Heart Association functional class 2,8 ± 0.5, left ventricular (LV) ejection fraction 28,6 ± 12,6 %, 154 ± 25 ms QRS duration and PVC were analysed with bipolar transesophageal LV and left atrial electrogram recording and National Instruments LabView 2009 software. The level of significance of the t-test is 0,005.
Results: QRS duration increases during PVC (188 ± 32 ms) in comparison to the beat before (154 ± 25 ms, P = ) and after PVC (152 ± 25 ms,). IVCD increases during PVC up to 65 ± 33 ms (51 ± 19 ms in the beat before PVC, P=0.18, 49 ± 19 ms after PVC, P = 0.12). Intra-LV delay of 90 ± 16 ms is not different in the beat before PVC, 90 ± 14 ms during PVC (P = 0.99) and 94 ± 16 ms in the beat after PVC (P = 0.38). IACD is not significantly PVC influenced (67 ± 12 ms before PVC and 65 ± 13 ms after PVC, P = 0.71). Intra-left atrial conduction delay is not significant longer during PVC (57 ± 28 ms) than in the beat before PVC (54 ± 13 ms, P = 0.51) or after PVC (54 ± 8 ms, P = 0.45). PQ duration increases significantly after PVC (224 ± 95 ms) in comparison to the beat before PVC (176± 29 ms, P =...).
Conclusion: Transesophageal left cardiac electrocardiography with LabView 2009 software can improve evaluation of IVCD and IACD before, during and after PVC in HF patient selection for CRT.
Y1  - 2011
SN  - 0013-5585 (Print)
SS  - 0013-5585 (Print)
SN  - 1862-278X (Online)
SS  - 1862-278X (Online)
U6  - https://doi.org/10.1515/bmt.2011.856
DO  - https://doi.org/10.1515/bmt.2011.856
VL  - 56
IS  - S1
SP  - 4
S1  - 1
PB  - Walter de Gruyter
CY  - Berlin, Boston
ER  -