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Abstract: Poster Presentations |

ASSOCIATION OF THE QRS DURATION ON THE RESTING ELECTROCARDIOGRAM WITH THE SEVERITY OF CORONARY ARTERY DISEASE IN 2,196 PATIENTS UNDERGOING CORONARY ANGIOGRAPHY FOR SUSPECTED CORONARY ARTERY DISEASE FREE TO VIEW

Kiran Chilappa, MD*; Wilbert S. Aronow, MD; Hari Kannam, MD; Srikala Devabhakturi, MD; Tarunjit Singh, MD; Kumar Kalapatapu, MD; Melvin B. Weiss, MD; Anthony L. Pucillo, MD; Craig E. Monsen, MD
Author and Funding Information

New York Medical College, Valhalla, NY


Chest


Chest. 2008;134(4_MeetingAbstracts):p86001. doi:10.1378/chest.134.4_MeetingAbstracts.p86001
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Abstract

PURPOSE:To investigate the association between QRS duration on the resting electrocardiogram (ECG) with severity of coronary artery disease (CAD) in patients undergoing coronary angiography for suspected CAD.

METHODS:We investigated the prevalence of a QRS duration ≥ 120 milliseconds on the resting ECG in patients with no CAD, nonobstructive CAD, 1-vessel obstructive CAD, 2-vessel obstructive CAD, and 3-vessel obstructive CAD undergoing coronary angiography for suspected CAD. The 2,196 patients included 1,291 men and 905 women, mean age 69 ± 10 years, with suspected CAD. Nonobstructive CAD was diagnosed if there was <50% obstruction of 1 major coronary artery. Obstructive CAD was diagnosed if there was >50% obstruction of at least 1 major coronary artery.

RESULTS:A QRS duration of ≥ 120 milliseconds on the resting ECG was present in 30 of 220 patients (14%) with no CAD,1 in 44 of 276 patients (16%) with nonobstructive CAD,2 in 76 of 441 patients (17%) with 1-vessel CAD,3 in 99 of 464 patients (21%) with 2-vessel CAD,4 and in 217 of 795 patients (27%) with 3-vessel CAD5 (p <0.001 comparing 5 with 1, 5 with 2, and 5 with 3; p<0.02 comparing 5 with 4 and 4 with 1).

CONCLUSION:The prevalence of a QRS duration ≥ 120 milliseconds on the resting ECG increased with increasing severity of obstructive CAD.

CLINICAL IMPLICATIONS:Patients with a QRS duration ≥ 120 milliseconds on the resting ECG have a greater severity of obstructive CAD.

DISCLOSURE:Kiran Chilappa, No Financial Disclosure Information; No Product/Research Disclosure Information

Wednesday, October 29, 2008

1:00 PM - 2:15 PM


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