“An overactive thyroid may cause turbulent blood flow in the heart,” says Dr. Collier, leading to a what’s known as a systolic heart murmur—it occurs before the first sound your heart ...

Outside of the heart, audible turbulence is referred to as a bruit, whereas inside the heart it is called a murmur. A pictorial representation of systolic and diastolic murmurs is below.

the left atrial and left ventricular pressures equalize quickly in early systole resulting in only a short, early systolic murmur or no audible murmur at all.

Examination revealed an inconsequential precordial systolic murmur and an electrocardiographic pattern of a short PR interval and a prolonged QRS complex. The patient was made to exercise to the ...