Fig. 1

a Electrocardiographic examination of a clinically healthy and echocardiographically normal Squirrel monkey recorded by AliveCor Vet TM® (duration: 30s; 50 Hz scale: 25 mm/s, 10 mm/mV). b Electrocardiographic examination of a clinically healthy and echocardiographically normal Squirrel monkey recorded by GE Vivid-I portable ultrasound machine (duration: 30s; 50 Hz scale: 25 mm/s, 10 mm/mV). This is the same monkey as Fig. 1a in order to compare the quality of the electrocardiographic recordings of both the AliveCor Vet TM® and GE Vivid-I portable ultrasound machine