A cardiac<unk>  is an abnormal<unk>  sound produced as a result of turbulent blood flow, which is sufficient to produce audible noise, defined as a relatively prolonged series of auditory vibrations of varying intensity (loudness), frequency (pitch), quality, configuration, and duration.<unk> s are not characteristic of normal cardiac physiology and may warrant further evaluation, particularly if they occur during diastole.  However,<unk> s are sometimes "innocent" or benign if they are only due to increased flow across a normal<unk>  structure.
Heart murmur
Tachycardia
Hypernea
Palpitation
Irregular pulse
Muffled heart sounds
Orthopnea
Bradycardia