Although the latter scenario may induce ST-elevations in right precordial leads
, mimicking BrS, subsequent ventricular tachycardia (VT) or VF episodes occur in a subset of patients without obstructive CAD and/or with diagnosed BrS.
Brugada syndrome is characterised by electrocardiographic changes demonstrating coved ST segment elevation in the right precordial leads
The ECG shows ST segment elevation in the precordial leads
V1 to V3, with morphology of the QRS complex resembling a right bundle branch block.
Exposure to CAPs (median, 285.7; range, 161.3-957.3 [micro]g/[m.sup.3]) significantly (p = 0.007) enhanced occlusion-induced peak ST-segment elevation in precordial leads
[V.sub.4] (9.4 [+ or -] 1.7 vs.
The presence of ST segment elevation in the right precordial leads
remains the hallmark of the condition and helps distinguish three types of BrS .
Currently ST segment elevation in the right precordial leads
, particularly RV4, is the most powerful predictor of RV involvement in the setting of inferior wall MI (3, 10).
In addition, it meets two criteria for LVH that have been validated in patients with left anterior fascicular block: S wave in lead III + largest R+S in any single precordial lead
>3.0 mV (6) and S[V.sub.1] + R[V.sub.5] + S[V.sub.5] > 2.5 mV.
(10) Finally, the ECG meets voltage criteria for LVH frequently used in patients with left anterior fascicular block: [S.sub.III] + largest R + S in any single precordial lead
[greater than or equal to] 30 mm or [SV.sub.1] + [RV.sub.5] + [SV.sub.5] [greater than or equal to] 25 mm (11); and RaVL [greater than or equal to] 13 mm.
The following positions are used for placement of a suction cup lead on the chest in order to obtain the correct precordial lead
Single right-sided precordial lead
in the diagnosis of right ventricular involvement in inferior myocardial infarction.
An early, sensitive, and reasonably specific hallmark of ARVC on the 12-lead ECG is T-wave inversion in right precordial leads
V1, V2, and V3 or beyond.
Six limb leads (I, II, III, aVR, aVL and aVF) were recorded in all animals, while in 18 dogs the precordial leads
(rV2, V2, V4 and V10) were obtained as well.