Brockenbrough-Braunwald-Morrow Sign: An Evaluative Hemodynamic Maneuver for Left Ventricular Outflow Tract Obstruction

Glenmore Lasam

Abstract


A case of a 77-year-old woman with a history of hypertrophic cardiomyopathy (HCM) presented with intermittent episodes of exertional dyspnea and chest discomfort. Her coronary angiogram revealed normal coronary arteries but with hypertrophic obstructive cardiomyopathy with an increasing left ventricular-aortic gradient on isoproterenol provocation. Likewise, an intensified gradient was observed after a premature ventricular contraction (PVC) that is distinguished as the Brockenbrough-Braunwald-Morrow sign substantiating confirmation of left ventricular outflow tract (LVOT) obstruction.




Cardiol Res. 2018;9(3):180-182
doi: https://doi.org/10.14740/cr676w

Keywords


Brockenbrough-Braunwald-Morrow sign; Hemodynamic maneuver; Left ventricular outflow tract obstruction; Arterial pulse pressure; Left ventricular systolic pressure; Premature ventricular contraction

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