Figure - available from: Annals of Noninvasive Electrocardiology
This content is subject to copyright. Terms and conditions apply.
(a) Baseline electrocardiogram depicting type‐2 Brugada ECG pattern. Convex ST‐segment elevation > 2 mm in V2 followed by a positive T wave. The β angle is ≥ 58°, and the duration of the base of the triangle of r' at 5 mm from the high take‐off is >4 mm. (b) Deep descendent ST‐segment depression in leads V3–V6 was observed 3 min after dipyridamole infusion (arrows). There is a type‐1 Brugada ECG pattern in lead V2 showing concave ST‐segment elevation > 2 mm followed by a negative T wave at 40 ms of high take‐off (arrowhead), and the decrease in amplitude of ST‐segment is ≤ 4 mm. (c) The ECG returns to baseline without signs of ischemia 15 min after aminophylline administration. Note the mismatch between leads V6 and V1 in both type‐2 (a and c) and type‐1 (b) Brugada ECG patterns
Source publication
The diagnosis of Brugada syndrome is usually made with a typical ECG pattern. However, different disorders can emulate this pattern (Brugada phenocopies). Pathophysiologic mechanisms underlying this phenomenon remain controversial. We describe the development of type‐1 Brugada ECG pattern associated with extensive coronary steal effect during myoca...
Citations
... infarction. Nevertheless, imaging is needed to confirm or exclude acute myocardial ischemia such as conus branch of the RCA spasm or dissection [20,21], coronary steal effect [22] and transient mechanical compression on coronary artery or the graft. ...
A 71-year old male with a history of inferior myocardial infarction and hypertension underwent coronary artery bypass graft (CABG) surgery. He had no family or personal history of syncope, sudden cardiac death or Brugada syndrome. A series of twelve-lead electrocardiograms showed type 1 and type 2 Brugada ECG patterns after procedure, but resolution of ST segment changes to five days later. The electrophysiological mechanisms underlying these changes will be discussed.
