Shahab Hunaina, Faheem Osman, Khandwala Kumail, Khan Aamir H
Cardiology, Aga Khan University Hospital, Karachi, PAK.
Radiology, Aga Khan University Hospital, Karachi, PAK.
Cureus. 2018 Oct 30;10(10):e3520. doi: 10.7759/cureus.3520.
A handful of cases of voluntary control of left bundle branch block (LBBB) have been described in the literature. We report the case of a middle-aged man who was found to have LBBB on baseline electrocardiogram (ECG) which disappeared on coughing and then reappeared with the same maneuver. Subsequent myocardial perfusion scan showed reduced count in the anteroseptal region likely attributed to LBBB. It is possible that the intermittent conduction changes may be due to the alteration in the vagal tone associated with cough as reflected in the change in the PR interval on the ECG.
文献中已描述了少数几例可自主控制左束支传导阻滞（LBBB）的病例。我们报告一例中年男性，其基线心电图（ECG）显示有LBBB，咳嗽时该阻滞消失，再次进行相同动作时又重新出现。随后的心肌灌注扫描显示前间隔区域计数减少，可能归因于LBBB。间歇性传导变化可能是由于咳嗽相关的迷走神经张力改变所致，这在心电图上的PR间期变化中得到体现。
