Doppler derived gradient of St. Jude mechanical prosthesis, early postoperative assessment.
OBJECTIVE
To determine the doppler derived mean gradients of St Jude mechanical prosthesis in early postoperative period in patients undergoing valve replacement at a tertiary care cardiac centre.


METHODS
Medical records of 190 consecutive patients who underwent 233 mitral, aortic or dual (mitral and aortic) valve replacement by St Jude bileaflet mechanical prosthesis at Tabba Heart Institute, between March 2006 to December 2008 were reviewed. Doppler derived mean gradients were assessed predischarge and recorded.


RESULTS
There were 98 (51.5%) males and 92 (48.5%) females in the study cohort. The mean age was 40 +/- 14 years. Of the total, 101 (53%) had mitral, 46 (24.2%) had aortic and 43 (22.6%) patients had dual valve replacement. Doppler derived mean gradient was assessed across 144 mitral and 89 aortic St Jude mechanical prosthesis. Doppler derived mean gradient for St Jude mitral prosthesis was 3.5 mm Hg and for St Jude aortic prosthesis was 10.2 mm Hg.


CONCLUSIONS
The study determines baseline gradients across mitral and aortic St Jude mechanical prosthesis in our population. These can be used as reference gradients to assess St Jude prosthetic valve function in patients who did not have early postoperative doppler assessment.
Tabba Heart Institute, Karachi.
Ayaz Hussain
AH
Shaikh
Bashir
B
Hanif
Amina
A
Adil
Shahrukh
S
Hashmani
Sharukh
S
Hashimi
Hammad Ali
HA
Qazi
Iqbal
I
Mujtaba
D000328:Adult; D001021:Aortic Valve / Q000000981:diagnostic imaging / Q000601:surgery*; D001783:Blood Flow Velocity / Q000502:physiology; D015331:Cohort Studies; D015150:Echocardiography, Doppler / Q000379:methods; D005260:Female; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000379:methods; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000000981:diagnostic imaging / Q000601:surgery*; D011184:Postoperative Period; D011474:Prosthesis Design; D012016:Reference Values