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(A) Negative pharmacological provocative test. Negative ajmaline (Class Ia antiarrhythmic with potent sodium channel blocking effects) provocative test showing no ST‐segment elevation in the parasternal leads. (B) The characteristics of the triangle formed by the r’ The β angle formed by the ascending S and descending r’ is 34°. The duration of the base of the triangle of r’ at 5 mm from the high takeoff is 3.29 mm. Maximum R height: 2.86 mm.
