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Paroxysmal Atrioventricular Block Induced During Head‐Up Tilt Testing in an Apparently Healthy Man
Author(s) -
SUMIYOSHI MASATAKA,
NAKATA YASURO,
MINEDA YORIAKI
Publication year - 1997
Publication title -
journal of cardiovascular electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.193
H-Index - 138
eISSN - 1540-8167
pISSN - 1045-3873
DOI - 10.1111/j.1540-8167.1997.tb00824.x
Subject(s) - medicine , asystole , atrioventricular block , tilt (camera) , syncope (phonology) , cardiology , anesthesia , heart block , heart rate , tilt table test , electrocardiography , blood pressure , mechanical engineering , engineering
Paroxysmal AV Block During HUT Testing. Introduction : Prolonged asystole during head‐up tilt testing has been reported, but the occurrence of paroxysmal AV block appears to he rare. Methods and Results : A 25‐year‐old man with no history of syncope underwent head‐up tilt testing. After 11 minutes of 80° tilting, he developed syncope with paroxysmal AV block and asystole lasting 10.5 seconds. However, this response was not reproduced during a subsequent tilt test 4 weeks later. Treadmill exercise testing and Holter monitoring showed no abnormalities. Power spectral analysis of heart rate variability revealed a marked increase in sympathetic activity several minutes before the induction of paroxysmal AV block. Conclusion : We report a case of paroxysmal AV block that occurred during head‐up tilt testing but did not recur on a subsequent test in an apparently healthy young man.