What do the vertical lines on the ECG graph measure?

Vertical lines indicate the speed of the electrical current traveling within the heart. The distance in time between two heavy vertical lines is 0.20 seconds and between two light vertical lines or across one small square is 0.04 seconds.

What is ECG paper?

ECG paper is marked with a grid of small and large squares. Each small square represents 40 milliseconds (ms) in time along the horizontal axis and each larger square contains 5 small squares, thus representing 200 ms. Standard paper speeds and square markings allow easy measurement of cardiac timing intervals.

How do you reset an ECG machine?

If the electrocardiograph stops functioning, you can press and hold the Power On/Off key for approximately 7 seconds to restart the electrocardiograph. Release the key once the restart begins.

What is the normal size of ECG graph paper?

ECG paper is a grid where time is measured along the horizontal axis. Each small square is 1 mm in length and represents 0.04 seconds. Each larger square is 5 mm in length and represents 0.2 seconds.

What is the normal paper speed?

Paper speed: the standard is 25 mm/sec, the faster the paper speed the slower the HR will look and vice versa.

Can ECG detect heart blockage?

Your doctor may use an electrocardiogram to determine or detect: Abnormal heart rhythm (arrhythmias) If blocked or narrowed arteries in your heart (coronary artery disease) are causing chest pain or a heart attack.

What is the normal ECG result?

Normal intervals Normal range 120 – 200 ms (3 – 5 small squares on ECG paper). QRS duration (measured from first deflection of QRS complex to end of QRS complex at isoelectric line). Normal range up to 120 ms (3 small squares on ECG paper).

How do I re setup an ECG on my Apple watch?

Follow these steps to set up the ECG app:

1. Open the Health app on your iPhone.
2. Follow the onscreen steps. If you don’t see a prompt to set up, tap the Browse tab, then tap Heart > Electrocardiograms (ECG) > Set Up ECG App.
3. After you complete set up, open the ECG app to take an ECG.