The Relationship Between QRS Treadmill Score (QTS) and Coronary Artery Disease Extent

Relationship between QRS score and the extent of coronary artery disease V G Cin 1, M Celik, S Ulucan Affiliations expand PMID: 9486931 DOI: 10.1536/ihj.38.787

We studied 92 patients to determine the relationship between the QRS treadmill score (QTS) and extent of coronary artery disease. The results were compared to those of ST segment deviation in a < (+)QRS score > population. A cut off point of < 5 mm was used for mild to moderate risk patients whereas a QTS of < 3 was considered high risk for the patients. 43% of the patients had high risk QTS and 57% mild to moderate QTS. A highly significant correlation was observed between the extent of coronary artery disease and the high risk group of patients, whereas nonsignificant changes were observed in the control group (p < 0.001). Finally, the results indicate that in patients with a (+) QTS score (< 5 mm), coronary artery disease was significant and accordingly extensive during coronary angiography. On the other hand, a (+) QRS score proved to be superior to ST deviation in predicting critical coronary stenoses in the same population (F ratio; 41 vs 24).

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Evaluation of QRS Treadmill Score (QTS) in Coronary Artery Disease

This clinical study analyzed 92 patients to determine the correlation between the QRS treadmill score (QTS) and the overall extent of coronary artery disease (CAD). The research focused on comparing the diagnostic accuracy of QTS against traditional ST segment deviation within a (+)QRS score population.

Risk Stratification and Methodology

To effectively categorize the participants, specific cut-off points were established based on their QTS results. A score of < 5 mm was utilized to identify mild to moderate risk patients, whereas a QTS of < 3 was defined as the threshold for high-risk individuals. This stratification allowed for a precise assessment of cardiovascular health across the study group.

Analysis of Clinical Findings and Risk Distribution

The study population was divided into two primary risk categories based on their performance. The distribution and statistical significance of these findings are detailed below:

High-Risk Group: 43% of the patients were identified in this category.
Mild to Moderate Risk Group: 57% of the patients were identified in this category.

A highly significant correlation (p < 0.001) was observed between the extent of coronary artery disease and the high-risk patient group. Conversely, the control group showed nonsignificant changes, reinforcing the predictive value of the QTS metric.

Comparative Superiority: QTS vs. ST Deviation

The final results indicate that patients presenting with a (+) QTS score (< 5 mm) exhibited significant and extensive coronary artery disease during coronary angiography. When comparing diagnostic markers, the (+) QRS score proved to be superior to ST segment deviation in predicting critical coronary stenoses within the same population.

Diagnostic Metric	F Ratio Value
(+) QRS Score	41
ST Segment Deviation	24

In conclusion, the data suggests that the QRS treadmill score serves as a more robust indicator of extensive coronary involvement than traditional ST segment analysis.

Yazar Hakkında

Prof. Dr. Şeref Ulucan

Kardiyoloji

Porf Dr. Şeref ULUCAN, 15 Eylül 1968 tarihinde doğmuştur. Lisans öncesi öğrenimlerinin ardından Erciyes Üniversitesi Tıp Fakültesi'nde başladığı tıp eğitimini başarıyla tamamlayarak 1993 yılında tıp doktoru unvanı almıştır. İhtisasını ise Selçuk Üniversitesi Tıp Fakültesi'nde yapmış ve 1997 yılında Kardiyoloji Uzmanı olmuştur.

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