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Transient pacing pulse on the T-wave: What is the mechanism?
Indian Pacing Electrophysiol J
September 2024
Department of Cardiology, Soka Municipal Hospital, Saitama, Japan. Electronic address:
A patient with a dual-chamber pacemaker for sick sinus syndrome was hospitalized for heart failure. The electrocardiography (ECG) during hospitalization displayed seemingly abnormal pacing artifacts. This report focuses on the problem-solving of an abnormal-looking paced ECG and identifies the pacemaker's operational behavior as the underlying reason.
View Article and Find Full Text PDFQuadripolar left ventricle only single lead pacing in a patient with a tricuspid mechanical valve: A less invasive approach.
J Cardiol Cases
March 2023
Cardiology Service, Central Lisbon Hospital and University Center, Lisbon, Portugal.
Unlabelled: In the presence of prosthetic tricuspid valve, the inaccessibility to the right ventricle makes permanent pacing challenging. The placement of a left ventricle (LV) single lead in the coronary sinus (CS) is a well-accepted alternative, with some limitations regarding sensing and threshold. We describe a clinical case of a patient who had a previous LV only lead in the CS due to the presence of a prosthetic tricuspid valve and, after a surgical valvular intervention, presented with recurrent syncope episodes due to lead malfunction with lack of pacing capture and significant ventricular pauses.
View Article and Find Full Text PDF[Research on the detection algorithm of electrocardiogram characteristic wave based on energy segmentation and stationary wavelet transform].
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
December 2021
Beijing Zhaoyi Innovation Technology Co., Ltd, Beijing 100088, P.R.China.
The detection of electrocardiogram (ECG) characteristic wave is the basis of cardiovascular disease analysis and heart rate variability analysis. In order to solve the problems of low detection accuracy and poor real-time performance of ECG signal in the state of motion, this paper proposes a detection algorithm based on segmentation energy and stationary wavelet transform (SWT). Firstly, the energy of ECG signal is calculated by segmenting, and the energy candidate peak is obtained after moving average to detect QRS complex.
View Article and Find Full Text PDFDevice interaction between cardiac contractility modulation (CCM) and subcutaneous defibrillator (S-ICD).
J Cardiovasc Electrophysiol
November 2021
Department of Cardiology and Angiology I, University Heart Center Freiburg-Bad Krozingen, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
Combined implantation of cardiac contractility modulation (CCM) with subcutaneous implantable cardioverter-defibrillator (S-ICD) appears a suitable option to reduce the amount of intracardiac leads and complications for patients. Here we report on a patient with ischemic cardiomyopathy carrying an S-ICD in which a CCM device was implanted. During crosstalk testing post-CCM implantation, the S-ICD misannotated QRS complexes and T waves.
View Article and Find Full Text PDFHow to solve T-wave oversensing in an implantable cardiac monitor with a long sensing vector?
Pacing Clin Electrophysiol
December 2020
Cardiologia Ospedaliera, Policlinico di Bari, Bari, Italy.
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