High-frequency QRS electrocardiogram predicts perfusion defects during myocardial perfusion imaging

Changes in high-frequency (HF) QRS components of the electrocardiogram (ECG) (150-250 Hz) are more sensitive than changes in conventional ST segments for detecting myocardial ischemia. We investigated the accuracy of 12-lead HF QRS ECG in detecting perfusion defects during adenosine tetrofosmin myoc...

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Bibliographic Details
Published in:Journal of electrocardiology 2006, Vol.39 (1), p.73-81
Main Authors: Rahman, M. Atiar, Gedevanishvili, Alex, Birnbaum, Yochai, Sarmiento, Laura, Sattam, Waralee, Kulecz, Walter B., Schlegel, Todd T.
Format: Article
Language:English
Subjects:
Adenosine
Aged
Chest Pain - diagnosis
Coronary
Coronary Circulation - physiology
Electrocardiography
Exercise Test
False Positive Reactions
Female
Humans
Ischemia
Male
Middle Aged
Myocardial Ischemia - diagnosis
Myocardial Ischemia - diagnostic imaging
Myocardial Ischemia - physiopathology
Nuclear
Organophosphorus Compounds
Organotechnetium Compounds
Preoperative Care
Radionuclide Imaging
Radiopharmaceuticals
Regression Analysis
Sensitivity and Specificity
Signal Processing, Computer-Assisted
Vasodilator Agents
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Summary:Changes in high-frequency (HF) QRS components of the electrocardiogram (ECG) (150-250 Hz) are more sensitive than changes in conventional ST segments for detecting myocardial ischemia. We investigated the accuracy of 12-lead HF QRS ECG in detecting perfusion defects during adenosine tetrofosmin myocardial perfusion imaging (MPI). 12-lead HF QRS ECG recordings were obtained from 45 patients before and during adenosine technetium Tc 99m tetrofosmin MPI tests. Before the adenosine infusions, recordings of HF QRS were analyzed according to a morphologic score that incorporated the number, type, and location of reduced amplitude zones (RAZs) present in the 12 leads. During the adenosine infusions, recordings of HF QRS were analyzed according to the maximum percentage changes (in both the positive and negative directions) that occurred in root mean square voltage amplitudes within the 12 leads. The best set of prospective HF QRS criteria had a sensitivity of 94% and a specificity of 83% for correctly identifying the MPI result. The sensitivity of simultaneous ST-segment changes (18%) was significantly lower than that of any individual HF QRS criterion ( P < .001). Analysis of 12-lead HF QRS ECG is highly sensitive and reasonably specific for detecting perfusion defects during adenosine MPI stress tests and significantly more sensitive than analysis of conventional ST segments.
ISSN:0022-0736
1532-8430
DOI:10.1016/j.jelectrocard.2005.07.003