Only US $ 3.95!
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• Professional ECG ruler, for reading:
• 2 x RR (25 mm/s)
• 1 x RR (50 mm/s)
• 3 x RR (25 mm/s)
• 3 x RR (50 mm/s)
• 4 x RR (25 mm/s)
• Amplitudes (mV)
• Times, intervals (s)
• Conversion: heart rate – RR interval
• Table. heart rate – PR interval – relative QT interval