Step 7. Focus on working the muscles around the collar bone area with chest lifts. Sit in a straight-back chair. Place your hands behind you and hold onto the sides of the chair back to feel a stretch across your chest. Lift your chest while slightly arching your back and hold the lift for a count of two.
This is the side that pumps blood to the body. The heart's lower chamber, called the left ventricle, cannot pump blood as well. It's called systolic because your ventricle doesn't squeeze forcefully enough during systole, which is the phase of your heartbeat when your heart pumps blood. Tests may show a low ejection fraction. This means that your left ventricle isn't working as well as normal.
The main pumping chamber of the heart, the left ventricle, typically enlarges first. As the pressure rises in the left ventricle, the left atrium gradually enlarges as well. When left atrial enlargement occurs due to elevated blood pressure, it is associated with an increased risk of heart attack and stroke.