Where to palpate an apical impulse?

The apical impulse, also known as the point of maximal impulse (PMI), is typically palpated at the fifth intercostal space, just medial to the midclavicular line on the left side of the chest. To locate it, find the clavicle, move down to the fifth rib, and slide your fingers to the left side of the chest. In some patients, particularly those with a larger chest or certain conditions, the PMI may be located slightly higher or lower, or more lateral.