Accuracy of ECG during Exercise Stress Test Based on Heart Size
Author Information
Author(s): Siegler Jason C., Rehman Shafiq, Bhumireddy Geetha P., Abdula Raushan, Klem Igor, Brener Sorin J., Lee Leonard, Dunbar Christopher C., Saul Barry, Sacchi Terrence J., Heitner John F.
Primary Institution: New York Methodist Hospital
Hypothesis
The purpose of this investigation was to assess the diagnostic accuracy of the exercise ECG based on heart size.
Conclusion
The study suggests that patients with small heart size have a higher false positive rate in exercise stress testing, particularly among women.
Supporting Evidence
- Small heart size was found in 142 patients, with a significant association between ECG outcome and heart size.
- Women accounted for the majority of patients with small heart size, highlighting gender differences in diagnostic accuracy.
- Patients with small hearts had a higher rate of false positives during exercise stress tests.
Takeaway
This study found that people with smaller hearts, especially women, are more likely to get incorrect results from heart tests during exercise.
Methodology
The study evaluated 1,011 patients referred for an exercise nuclear stress test, categorizing them by heart size and analyzing ECG outcomes.
Potential Biases
Potential bias due to the exclusion of patients with unsuitable resting ECGs and those not reaching the required heart rate during tests.
Limitations
The study used nuclear imaging as the criterion measure instead of coronary angiography, which may not fully capture ischemia.
Participant Demographics
The sample included 482 females and 529 males, with a significant number of small heart size patients being women.
Statistical Information
P-Value
0.03
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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