New insights into application of cardiac monophasic action potential

Title:

New insights into application of cardiac monophasic action potential

Creator:

Yang, S.-G. and Otomar Kittnar

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:66f05c0a-70f2-4d83-9f39-b1a1c014e66f
uuid:66f05c0a-70f2-4d83-9f39-b1a1c014e66f

Subject:

Fyziologie člověka a srovnávací fyziologie, elektrokardiografie, electrocardiography, monophasic action potential, 14, and 612

Type:

article, články, model:article, and TEXT

Format:

print

Description:

Monophasic action potential (MAP) recording plays an important role in a more direct view of human myocardial electrophysiology under both physiological and pathological conditions. The procedure of MAP measuring can be simply performed using the Seldinger technique, when MAP catheter is inserted through femoral vein into the right ventricle or through femoral artery to the left ventricle. The MAP method represents a very useful tool for electrophysiological research in cardiology. Its crucial importance is based upon the fact that it enables the study of the action potential (AP) of myocardial cell in vivo and, therefore, the study of the dynamic relation of this potential with all the organism variables. This can be particularly helpful in the case of arrhythmias. There are no doubts that physiological MAP recording accuracy is almost the same as transmembrane AP as was recently confirmed by anisotropic bidomain model of the cardiac tissue. MAP recording devices provide precise information not only on the local activation time but also on the entire local repolarization time course. Although the MAP does not reflect the absolute amplitude or upstroke velocity of transmembrane APs, it delivers highly accurate information on AP duration and configuration, including early afterdepolarizations as well as relative changes in transmembrane diastolic and systolic potential changes. Based on available data, the MAP probably reflects the transmembrane voltage of cells within a few millimeters of the exploring electrode. Thus MAP recordings offer the opportunity to study a variety of electrophysiological phenomena in the in situ heart (including effects of cycle length changes and antiarrhythmic drugs on AP duration)., S.-G. Yang, O. Kittnar., and Obsahuje bibliografii a bibliografické odkazy

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 2010 Volume:59 | Number:5

Harvested from:

CDK

Metadata only:

false