Changes in ventricular repolarization after balloon valvuloplasty in patients with pulmonary stenosis
Korean Circulation Journal
;
: 341-346, 2001.
Article
in Korean
| WPRIM
| ID: wpr-81102
ABSTRACT
BACKGROUND:
Alterations in ventricular loading conditions lead to changes in action potential duration via mechanoelectrical feedback. A decrease in load immediately leads to prolongation of repolarization. QT interval and QT dispersion were measured to determine the long-term effect of changes in ventricular systolic load on the ventricular repolarization.METHOD:
Corrected QT interval and QT dispersion were measured in 26 patients before and 3-6 months after valvuloplasty for pulmonary stenosis. To determine the effect of ventricular load on ventricular repolarization, patients were divided in 2 groups; Group 1 was those patients with a greater than 30 mmHg and Group 2 was those patients with a less than 30 mmHg decrease in right ventricular systolic pressure.RESULTS:
Corrected QT interval (412.6+/-14.5 msec vs 426.4+/-16.8 msec, p < 0.05) and QT dispersion (35.0+/-7.3 msec vs 45.7+/-14..1 msec, p < 0.05)were increased significantly only in Group 1 after vlavuloplasty.CONCLUSION:
It suggested that mechanoelectrical interactions are operative for long duration in humans that changes in ventricular load after successful pulmonary valvuloplasty showed long-term effect on the ventricular repolarization.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pulmonary Valve Stenosis
/
Blood Pressure
/
Action Potentials
/
Balloon Valvuloplasty
Limits:
Humans
Language:
Korean
Journal:
Korean Circulation Journal
Year:
2001
Type:
Article
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