10 Electrocardiographic (ECG) sensors and recorders; heart monitors; medical apparatus and instruments for monitoring and recording electrical activity generated by the heart for use in identifying cardiac arrhythmias; medical devices for detecting, recording, diagnosing and analyzing cardiac abnormalities, arrhythmia, atrial rhythms and ventricular rhythms; medical devices for detecting, recording, diagnosing and analyzing cardiac abnormalities, arrhythmia, atrial rhythms and ventricular rhythms in athletes; medical devices for screening athletes for cardiac abnormalities and risks; medical devices for detecting, recording, diagnosing and analyzing atrial fibrillation (AFib), atrial flutter, atrial contractions, tachycardia, and bradycardia; medical devices for detecting, recording, diagnosing and analyzing ventricular contractions, tachycardia, bigeminy and trigeminy; medical devices and sensors for detecting and recording electrocardiographic (ECG) signals and data; medical devices, namely, electrocardiographic (ECG) test kits comprised of electrocardiographic (ECG) sensor, patient skin preparation materials, sensor placement guide, and patient instructional guide sold as a unit