Why the study?
What are the characteristics of normal esophageal and gastric electrocardiograms, and how do they affect standards of abnormality?
What are the characteristics of normal esophageal and gastric electrocardiograms, and how do they affect standards of abnormality?
The study highlights that certain accepted standards for ECG abnormality, particularly regarding Q waves and infarction diagnosis from esophageal and gastric leads, may be inaccurate.
Questions accepted Q-wave criteria for infarction diagnosis; challenges longstanding ECG standards and warrants re-evaluation of diagnostic thresholds.
An analysis of normal esophageal and gastric electrocardiograms is presented. Some standards of abnormality in the literature are found to be unacceptable, principally with reference to Q and the diagnosis of infarction. The study of leads facing the dorsal and diaphragmatic cardiac surfaces seems to be a suitable test of current concepts of "electrocardiographic position." Some of these concepts are supported by this study, but others are questioned.
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Kistin et al. (1950) studied this question.
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