|APEX||Advanced Photovoltaic & Electronics Experiment|
|APEX||Academic Program for the Exceptional (Shelby County School System; Tennessee)|
|APEX||Aerodynamic Performance Experiment|
|APEX||Automated Planning and Execution Control System|
…with heartbeat, is called the apex beat. It is caused by pressure exerted on the chest wall at the outset of systole by the rounded and hardened ventricular wall.
The left anterior descending artery (LAD) is the largest coronary artery runs anterior to the interventricular septum in the anterior interventricular groove, extending from the base of the heart to the apex. The LAD gives two sets of branches.