1. A system for monitoring a condition of a patient's heart, the system comprising: a hardware processor that is configured to: receive a plurality of images of a first wall of the patient's heart, the plurality including a first image captured at a time t 1 and a second image captured at a time t 2 ; determine, based on the plurality of images, a first shape of at least a portion of the first wall at time t 1 and a second shape of the at least a portion of the first wall at time t 2 , the first shape and the second shape being determined by using one or more image processing techniques; determine from at least the first shape and the second shape that the at least a portion of the first wall is moving in a wavelike pattern; and output an indication of an abnormality in the patient's heart in response to determining that the at least a portion of the first wall is moving in the wavelike pattern.