I'm a French expat in China (Shanghai), in 201901 I had to obtain an electrocardiogram. A high-end hospital would do it for 1500 to ~3000 RMB (the local currency, 1 RMB is ~0.15 USD). I took the path used by locals, and had it done without any fuss or appointment for ~40 RMB.
Details: the hospital would do it after an "initial out-patient visit" costing "1,000 to 1,800", the ECG price is "500", and those are "estimated prices ((...)) subject to change."
Details: the hospital would do it after an "initial out-patient visit" costing "1,000 to 1,800", the ECG price is "500", and those are "estimated prices ((...)) subject to change."