Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
Pakistan Journal of Biological Sciences
  Year: 2008 | Volume: 11 | Issue: 20 | Page No.: 2407-2412
DOI: 10.3923/pjbs.2008.2407.2412
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Atrioventricular Delays, Cardiac Output and Diastolic Function in Patients with Implanted Dual Chamber Pacing and Sensing Pacemakers

F. Akbarzadeh and M. Toufan

Abstract:
The Cardiac Output (CO), Filling Time (FT) and Myocardial Performance Index (MPI) derived optimal atrioventricular delay (AVD), were compared and systolic and diastolic performance at every optimal AVD were analyzed. Thirty-two patients with implanted DDD pacemaker were investigated from implantation time to 6 months following PM implantation, in Cardiovascular Research Center of Tabriz University of Medical Sciences. The evaluation was performed during AV sequential pacing with different programmed AVDS ranged from 100 to 200 msec by steps of 20-30 msec. At every AVD, the following parameters were measured: FT, mitral VTI, ET, aortic VTI, ICT and IRT. CO and FT derived optimal AVDs were significantly different (146±37 and 126±35 msec, respectively), but their difference with MPI derived optimal AVDs was not significant (130±28 msec). ICT/ET was similar at CO, FT and MPI derived optimal AVD (0.24±0.10, 0.22±0.05 and 0.20±0.07, respectively). IRT/ET ratio was similar at CO, FT and MPI derived optimal AVDs (0.46±0.14, 0.45±0.10 and 0.42±0.10, respectively). Different methods indicate different optimal AVDs. However analysis of systolic and diastolic performance shows that different AVDs result in similar systolic or diastolic performance. At MPI optimized AVD, a high CO combined with the most advantageous conditions of both isovolumic contraction and relaxation phases is achieved.
PDF Fulltext XML References Citation Report Citation
How to cite this article:

F. Akbarzadeh and M. Toufan, 2008. Atrioventricular Delays, Cardiac Output and Diastolic Function in Patients with Implanted Dual Chamber Pacing and Sensing Pacemakers. Pakistan Journal of Biological Sciences, 11: 2407-2412.

DOI: 10.3923/pjbs.2008.2407.2412

URL: https://scialert.net/abstract/?doi=pjbs.2008.2407.2412

COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 

Curve Bottom