CORRELATION OF ST SEGMENT ELEVATION IN THE LEAD aVR DURING TMT WITH CORONARY ANGIOGRAM.

Manjunath R; Ravi Math; Ravindranath K S; Manjunath C N.

Volume : V, Issue : IX, September - 2016

CORRELATION OF ST SEGMENT ELEVATION IN THE LEAD aVR DURING TMT WITH CORONARY ANGIOGRAM.

Manjunath R, Ravi Math, Ravindranath K S, Manjunath C N.

Abstract :

BACKGROUND:– Treadmill testing (TMT) is the most widely used method for evaluating patients with coronary artery disease, predicting the left main coronary artery (LMCA) disease before invasive procedure is very important in risk assessment because of its severe clinical outcome. Lead aVR can be very useful in identifying LMCA obstruction, it is also valuable lead not only in diagnosis but also in predicting the prognosis. AIM:–To examine whether ST elevation in lead aVR during TMT may suggest LMCA disease since the lead aVR is the reciprocal lead of LMCA . METHOD:– In this study, 50 patients with positive TMT were included. The study group consisted of 30 patients with ST elevation of >1 mm in lead aVR. 20 patients also having positive TMT, but with <1mm of ST elevation in lead aVR comprised the control group. All patients underwent coronary Angiography. RESULTS:–Coronary angiography in the study group revealed significant LMCA disease in 19(63%) patients, whereas no LMCA disease in the control group. 6(20%) patients had ostioproximal LAD lesions in study group, 2(10%)patients in the control group. Tripple vessel disease in 5(17%)patients in study group, 3(15%)patients in the control group. Significant �P� value indicates ST segment elevation in lead aVR during TMT which strongly predicts the presence of LMCA disease. CONCLUSION:–ST segment elevation in the lead aVR of >1 mm during Treadmill testing(TMT)is a strong predictor of LMCA disease.