Review on Essential ECG Ruler Pocketcard Warp United by Marco Cervantes
BEST ECG ruler (I've tried them all)
Robust reference with normal limits for all parts of an ECG cycle that I use daily as an ER document (mV scale is BEST). Just put it on and go. I only wish they had made a smaller version WITHOUT foreign scales for non-standard velocities and amplitudes as it is too big to carry around easily.
- Robust construction
- No car
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