title: Adenosine Stress Induced Left Bundle Branch Block During Technetium-99m Tetrofosmin Myocardial Perfusion Imaging.
abstract: The occurrence of left bundle branch block (LBBB) in electrocardiogram during exercise testing is a relatively rare finding. The incidence of LBBB during exercise testing ranges from 0.5% to 1.1%. The mechanism of exercise-induced LBBB (EI-LBBB) is poorly understood, but ischemia is a proposed etiology. Stress myocardial perfusion imaging (MPI) can be useful in patients with EI-LBBB to rule out coronary artery disease. Adenosine vasodilator stress is the preferred mode of stress in patients with LBBB for performing stress-MPI. Here we present an interesting case of adenosine-induced LBBB during stress-MPI in a 67-year-old female patient with normal coronary angiography.
authors.affiliation: Department of Nuclear Medicine, PGIMER, Chandigarh, India.
authors.forename: Mohan Roop
authors.initials: MR
authors.lastname: Jayanthi
authors.affiliation: Department of Nuclear Medicine, PGIMER, Chandigarh, India.
authors.forename: Arun
authors.initials: A
authors.lastname: Sasikumar
authors.affiliation: Department of Nuclear Medicine, PGIMER, Chandigarh, India.
authors.forename: Arun Kumar Reddy
authors.initials: AK
authors.lastname: Gorla
authors.affiliation: Department of Nuclear Medicine, PGIMER, Chandigarh, India.
authors.forename: Ashwani
authors.initials: A
authors.lastname: Sood
authors.affiliation: Department of Nuclear Medicine, PGIMER, Chandigarh, India.
authors.forename: Anish
authors.initials: A
authors.lastname: Bhattacharya
authors.affiliation: Department of Nuclear Medicine, PGIMER, Chandigarh, India.
authors.forename: Bhagwant Rai
authors.initials: BR
authors.lastname: Mittal
keywords: Adenosine-induced left bundle branch block; left bundle branch block; myocardial perfusion imaging; tetrofosmin