[Effect of programming different AV intervals on mitral insufficiency in patients with DDD pacemaker].
OBJECTIVE
To study the effect of programming three different atrioventricular intervals (AVI) on mitral insufficiency (MI) in patients with permanent pacemaker due to complete atrioventricular block.


METHODS
We included 9 patients (mean age 62 +/- 11 years; 6 men), with permanent DDD pacemaker, isolated MI and normal ventricular function. We evaluated MI (in a quantitative way) and cardiac output (CO) through echocardiographic examination with three different AVI (100, 150 and 200 ms).


RESULTS
We observed a reduction in the severity of MI with the reduction of the AVI (best results obtained with AVI of 100 ms). We also observed an increase in the CO in 4 patients (those with MI of greater degree) with AVI of 100 ms.


CONCLUSIONS
We observed a correlation of longer AVI with greater degree of MI; our results point to the possibility of increasing the CO of patients with greater degrees of MI with shortening of the AVI (probably due to a partial recovery of the regurgitant volume).
Costa
M
M
Serviço de Cardiologia dos Hospitais da Universidade de Coimbra. marcogege@yahoo.com
Elvas
L
L
Ventura
M
M
Cristóvão
J
J
Martins
R
R
Providência
L
L
D000368:Aged; D002304:Cardiac Pacing, Artificial / Q000379:methods*; D004867:Equipment Design; D005260:Female; D006327:Heart Block / Q000150:complications / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008944:Mitral Valve Insufficiency / Q000150:complications / Q000503:physiopathology*; D011446:Prospective Studies
Influência da programação de diferentes intervalos AV na insuficiência mitral em doentes com pacemaker em modo DDD.