Cardiologia (Rome, Italy)
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Cardiologia (Rome, Italy) · Dec 1992
Comparison of ST segment changes on standard and Holter electrocardiogram during exercise testing.
In order to compare the ST segment changes recorded simultaneously on Holter (Del Mar Avionics 445B recorder and DCG VII Scanner) and standard electrocardiogram, 22 patients with chest discomfort and normal resting ECG were evaluated during exercise testing. The conventional ECG was recorded using chest lead V5 and a modified lead II. The Holter recording was done using the bipolar chest lead CM5 and the same modified lead II. ⋯ Thus the amplitude of ST depression was higher in lead CM5 by a mean of 0.7 mm compared to the lead V5. ST segment depression was present only in 6 cases in the modified lead II. ST segment depressions were reproduced faithfully in 3 patients and within the variation of 0.5 mm in other 3 cases by the Holter system.(ABSTRACT TRUNCATED AT 250 WORDS)