question: Had an abnormal EKG with a LBBB (QRS - 142) diagnosis. It was confirmed on an echo with the following echo interpretation summary of: Borderline left ventricular systolic function, ejection fraction 50% Normal right ventricular systolic function Tricuspid regurgitation - mild Elevated pulmonary artery systolic pressure - borderline I am scheduled for a stress echo next week but not sure if I should continue exercising. Am I at any higher risk of heart failure if I continue exercising?