Salman Khalid, Bamansoor, Sohail Yousaf, Ahmad Masood Akbar.
Aortic annulus diameter on echocardiography and Computed Tomography angiography compared with per operative diameter.
J Cardiovascular Dis Dec ;14(4):82-6.

BACKGROUND AND OBJECTIVE: In patients undergoing Aortic valve replacement, an important consideration is measurement of aortic valve diameter which can be measured pre-operatively using Echocardiography or CT angiography but is confirmed per-operatively. The objective of this study was to determine the mean difference of aortic annulus diameter measured on echocardiography and CT Angiography from per operative measurement of the same. METHODS: This was a cross sectional study conducted at Punjab Institute Of Cardiology, Lahore from March to August, 2013. Patients undergoing AVR were selected from outpatient, inpatient and emergency departments. Aortic annulus diameter was measured separately by using Echocardiography and computed tomographic angiography and both were compared with per-operative diameter. The mean differences of both pre-operative measurements from the per-operative measurement were noted. RESULTS: Thirty patients were studied out of which 20 (66 %) patients were male. Mean age was 28.93 years. The mean aortic annulus diameter on echocardiography and Cardiac CT was 21.93 mm and 23.36 mm respectively whereas the mean diameter of the aortic annulus per operatively was 23.27 mm. The mean aortic diameter on Echocardiography differed from per operative measurement by 1.33 mm and that on CT Angiography differed by 0.093 mm. CONCLUSION: The aortic annulus diameter measured on cardiac CT was closer to the intra-operative sizing as compared to Echo derived annular diameter. KEY WORDS: Aortic annulus diameter , Echocardiography , CT Angiography, Cardiac CT.

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