Value of lead aVR in predicting acute occlusion of proximal left anterior descending coronary artery and in-hospital outcome in ST-elevation myocardial infarction: an electrocardiographic predictor of poor prognosis.
BACKGROUND
We aimed to investigate the value of ST elevation in lead aVR (ST upward arrow aVR) in predicting the left anterior descending coronary artery (LAD) occlusion site proximal to first septal perforator (S(1)) and its effect on in-hospital outcome in ST-elevation myocardial infarction (STEMI).


METHODS
The study included 950 patients with STEMI. Patients were divided into 2 groups as aVR(+) and aVR(-) according to the presence of an ST upward arrow aVR of 0.5 mm or greater.


RESULTS
ST elevation in lead aVR was seen in 155 (16%) patients, and LAD occlusion proximal to S(1) was detected in 52% of patients in the aVR(+) group and in 9% of patients in the aVR(-) group. aVR positivity was associated with higher heart rate, lower systolic blood pressure and ejection fraction, and worse Killip class at the hospital admission. In-hospital mortality was 19% in the aVR(+) group and 5% in the aVR(-) group. aVR positivity was an independent predictor of in-hospital death.


CONCLUSIONS
This study revealed that ST upward arrow aVR was not only a good indicator of LAD occlusion proximal to S(1) but also a source of valuable information about in-hospital outcome in patients with STEMI.
Aygul
Nazif
N
Meram Faculty of Medicine, Cardiology Department, Selcuk University, Konya, Turkey. nazifaygul@yahoo.com
Ozdemir
Kurtulus
K
Tokac
Mehmet
M
Aygul
Meryem Ulku
MU
Duzenli
Mehmet Akif
MA
Abaci
Adnan
A
Bacaksiz
Ahmet
A
Yazici
Hüseyin
H
Bodur
Sait
S
D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000401:mortality*; D015897:Comorbidity; D023921:Coronary Stenosis / Q000175:diagnosis* / Q000401:mortality*; D004562:Electrocardiography / Q000295:instrumentation / Q000706:statistics & numerical data*; D004566:Electrodes; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000401:mortality*; D011379:Prognosis; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors; D016019:Survival Analysis; D015996:Survival Rate; D014421:Turkey / Q000453:epidemiology