Abstract
The value of esophageal leads for the study of cardiac arrhythmias is well established, but we found difficulties in some cases; (1) It may be impossible to distinguish P and QRS or to separate them when they are superimposed, because their component rapid deflections may be similar, and their relative sizes may vary widely, P being equal to, larger, or smaller than QRS; and (2) Differences in configuration of QRS and even P may be more apparent in other leads. These difficulties may be obviated by the use of a simultaneous standard lead. The complementary value of simultaneous standard and esophageal leads is illustrated in six cases: (1) atrial tachycardia (flutter) with multifocal ventricular ectopic systoles or variations in ventricular conduction; (2) A-V dissociation with interference, different atrial foci discernible only in the E lead, and different QRS complexes discernible only in Lead III; (3) atrial tachycardia (flutter) with alternating bidirectional P waves; (4) atrial parasystole, difference in atrial foci apparent in the standard leads, but not in the E lead; (5) ventricular tachycardia with retrograde conduction to the atria; and (6) double reciprocal beats (return extrasystoles) after ventricular ectopic systoles. The arrhythmia of Case 3 has not previously been described and that of Case 6 only once. Their recognition is an indication of the value of the method.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.