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Electrocardiography is the process of producing an electrocardiogram (ECG or EKG), a recording - a graph of voltage versus time - of the electrical activity of the heart[4] using electrodes placed on the skin. These electrodes detect the small electrical changes that are a consequence of cardiac muscle depolarization followed by repolarization during each cardiac cycle (heartbeat). Changes in the normal ECG pattern occur in numerous cardiac abnormalities, including cardiac rhythm disturbances (such as atrial fibrillation and ventricular tachycardia), inadequate coronary artery blood flow (such as myocardial ischemia and myocardial infarction), and electrolyte disturbances (such as hypokalemia and hyperkalemia).
BPM-E1204 Large Touchscreen Twelve Channels ECG Machine
Features:
1024*600 10inch color touchscreen display;
Twelve channel ECG machine with interpretation; 
12-lead ECG simultaneous acquisition; 
Multiple operation modes: Manual/Auto/Arrhythmia Analysis Modes; 
12-channel recording with a rhythm lead;
Digital filters eliminate EMG, AC, Baseline Drift interference; 
Built in rechargeable Li-ion battery, 2 hours continuous working; 
Adapt 110-240V, 50/60Hz AC power supply; 
250 patients save/replay; 
Built in USB/RS232 interface.
BPM is the best ECG machine supplier. Welcome your inquiry.