medical cardiogram close-up on green background

background medical heart pattern doctor paper cardiogram hospital medicine attack cardiology arrhythmia block tachycardia electrocardiogram analysis graph health patient pulse sinus ekg utility care cardie cardiac infarction myocardial beating cardiograph equipment problem secondary cardiovascular diagnosis closeup rehabilitation clinic cerebral curve chart disease blue beat atypical checkup ecg tachyarrhythmia electrocardiograph isolated close-up green printed