The influence of fat thickness on the human epicardial bipolar electrogram characteristics: Measurements on patients undergoing open-heart surgery

Magdi M. Saba; Jagan Akella; James Gammie; Robert Poston; Anthony Johnson; Robert E. Hood; Timm Michael Dickfeld; Stephen R. Shorofsky

doi:10.1093/europace/eup156

The influence of fat thickness on the human epicardial bipolar electrogram characteristics: Measurements on patients undergoing open-heart surgery

Magdi M. Saba, Jagan Akella, James Gammie, Robert Poston, Anthony Johnson, Robert E. Hood, Timm Michael Dickfeld, Stephen R. Shorofsky

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

AimsReference values exist for endocardial but not for epicardial (EPI) substrate mapping in cases of cardiomyopathy-associated ventricular tachycardia. We sought to establish such values for EPI electrogram voltage, including areas with overlying fat.Methods and resultsTen patients (six males) undergoing cardiac surgery were studied. After opening the pericardium, the distal bipole of an electrophysiology catheter was placed tangential to the EPI surface to obtain an electrogram recording. The bipole was tangentially rotated 90° and the higher of the two amplitudes (mV) was taken as the local amplitude. Recordings were taken from normal left and right ventricular myocardium (n = 26 data points each), over thick (≥0.5 cm) fat at both ventricular bases (n = 16) and thin (

Original language	English (US)
Pages (from-to)	949-953
Number of pages	5
Journal	Europace
Volume	11
Issue number	7
DOIs	https://doi.org/10.1093/europace/eup156
State	Published - Jul 2009
Externally published	Yes

Keywords

Ablation
Electrogram amplitude
Epicardial
Epicardial fat
Ventricular tachycardia

ASJC Scopus subject areas

Cardiology and Cardiovascular Medicine
Physiology (medical)

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10.1093/europace/eup156

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title = "The influence of fat thickness on the human epicardial bipolar electrogram characteristics: Measurements on patients undergoing open-heart surgery",

abstract = "AimsReference values exist for endocardial but not for epicardial (EPI) substrate mapping in cases of cardiomyopathy-associated ventricular tachycardia. We sought to establish such values for EPI electrogram voltage, including areas with overlying fat.Methods and resultsTen patients (six males) undergoing cardiac surgery were studied. After opening the pericardium, the distal bipole of an electrophysiology catheter was placed tangential to the EPI surface to obtain an electrogram recording. The bipole was tangentially rotated 90° and the higher of the two amplitudes (mV) was taken as the local amplitude. Recordings were taken from normal left and right ventricular myocardium (n = 26 data points each), over thick (≥0.5 cm) fat at both ventricular bases (n = 16) and thin (",

keywords = "Ablation, Electrogram amplitude, Epicardial, Epicardial fat, Ventricular tachycardia",

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T1 - The influence of fat thickness on the human epicardial bipolar electrogram characteristics

T2 - Measurements on patients undergoing open-heart surgery

AU - Saba, Magdi M.

AU - Akella, Jagan

AU - Gammie, James

AU - Poston, Robert

AU - Johnson, Anthony

AU - Hood, Robert E.

AU - Dickfeld, Timm Michael

AU - Shorofsky, Stephen R.

PY - 2009/7

Y1 - 2009/7

N2 - AimsReference values exist for endocardial but not for epicardial (EPI) substrate mapping in cases of cardiomyopathy-associated ventricular tachycardia. We sought to establish such values for EPI electrogram voltage, including areas with overlying fat.Methods and resultsTen patients (six males) undergoing cardiac surgery were studied. After opening the pericardium, the distal bipole of an electrophysiology catheter was placed tangential to the EPI surface to obtain an electrogram recording. The bipole was tangentially rotated 90° and the higher of the two amplitudes (mV) was taken as the local amplitude. Recordings were taken from normal left and right ventricular myocardium (n = 26 data points each), over thick (≥0.5 cm) fat at both ventricular bases (n = 16) and thin (

AB - AimsReference values exist for endocardial but not for epicardial (EPI) substrate mapping in cases of cardiomyopathy-associated ventricular tachycardia. We sought to establish such values for EPI electrogram voltage, including areas with overlying fat.Methods and resultsTen patients (six males) undergoing cardiac surgery were studied. After opening the pericardium, the distal bipole of an electrophysiology catheter was placed tangential to the EPI surface to obtain an electrogram recording. The bipole was tangentially rotated 90° and the higher of the two amplitudes (mV) was taken as the local amplitude. Recordings were taken from normal left and right ventricular myocardium (n = 26 data points each), over thick (≥0.5 cm) fat at both ventricular bases (n = 16) and thin (

KW - Ablation

KW - Electrogram amplitude

KW - Epicardial

KW - Epicardial fat

KW - Ventricular tachycardia

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The influence of fat thickness on the human epicardial bipolar electrogram characteristics: Measurements on patients undergoing open-heart surgery

Abstract

Keywords

ASJC Scopus subject areas

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