当前位置： SCI文献检索 > JOURNAL OF ELECTROCARDIOLOGY期刊下所有文献 > A comparison of ST segment deviation and calculated solid angle during acute regional ischemia in the isolated canine heart at precordial, epicardial and intramyocardial lead surfaces.

A comparison of ST segment deviation and calculated solid angle during acute regional ischemia in the isolated canine heart at precordial, epicardial and intramyocardial lead surfaces.

Abstract：

:Although solid angle analysis has been considered to be reasonable for explaining the distribution of ST segment deviation following ischemia, it has not been tested fully, especially for ST segment changes in various sites at different lead surfaces. Thus, we investigated the applicability of solid angle theory to the mechanism of ischemic ST segment deviation at intramyocardial, epicardial and precordial leads. We used seven isolated, coronary perfused, isovolumic contracting canine hearts in a homogeneous cylindrical volume conductor. ST segment potentials from 246 electrodes were continuously measured during left circumflex coronary artery occlusion for five minutes. The ischemic boundary was obtained from a postmortem angiography, and the solid angle subtended by the ischemic boundary was calculated at every electrode site. Despite the difference between epicardial and precordial ST segment potential distributions, there was a high correlation between measured ST segment potential and calculated solid angle at epicardial (r = 0.86 +/- 0.05, 0.77-0.93), precordial (r = 0.93 +/- 0.05, 0.84-0.99), and intramyocardial leads (r = 0.95 +/- 0.03, 0.91-0.99). We conclude that solid angle analysis can be used to approximate the distribution of ischemic ST segment deviation at different lead surfaces in acute ischemia.

journal_name

J Electrocardiol

journal_title

Journal of electrocardiology

authors

Maehara K,Kyono H,Kitaoka S,Shimizu Y,Maruyama Y,Ashikawa K,Ino-Oka E,Takishima T

doi

10.1016/s0022-0736(86)80033-4

subject

Has Abstract

pub_date

1986-07-01 00:00:00

pages

235-46

issue

3

eissn

0022-0736

issn

1532-8430

journal_volume

19

pub_type

杂志文章

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