Syndromes

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    30 year old female with a history of syncope.

    30 year old female with a history of syncope.

    Key Findings

    - Dramatically prolonged QT interval

    Coding for the Boards

    - Sinus rhythm

    - Prolonged QT interval

    Answers

    Discussion: When a tangent line is drawn from the steepest portion of the descending limb of the T-wave, this intersects with the baseline and a point closest to the following QRS. When this point falls to the right of midline as bordered by the two adjacent QRS is, this identifies a corrected QT interval that is high risk and is greater than 500 ms.