Final answer:
M-mode findings associated with pulmonary hypertension include a deep "a" dip of the pulmonic valve.
Step-by-step explanation:
M-mode findings associated with pulmonary hypertension include a deep "a" dip of the pulmonic valve. In M-mode echocardiography, the "a" dip refers to the descent of the valve during atrial contraction. In pulmonary hypertension, the elevated pressure in the pulmonary artery causes the pulmonic valve to close more forcefully, resulting in a deeper dip or descent of the valve.