How to read an Electrocardiogram (ECG) - Part 2, ECG Graph Interpretation

According to our part 1  now you know to to identify a P Wave, QRS Wave  and  T Wave.

The graph paper that the ECG records on is standardized to run at 25mm/second, and is marked at 1 second intervals on the top and bottom. The horizontal axis correlates the length of each electrical event with its duration in time. Each small block (defined by lighter lines) on the horizontal axis represents 0.04 seconds. Five small blocks (shown by heavy lines) is a large block, and represents 0.20 seconds. 

Duration of a waveform, segment, or interval is determined by counting the blocks from the beginning to the end of the wave, segment, or interval.

Then what are these Waves, segments, intervals ect...

There are some main parts of a ECG. They are

• The P Wave
• The PR Interval
• The QRS Complex
• The ST Segment
• The T Wave
• The U Wave
• The QT Interval

Part 1 PQRST Waves
Part 2 ECG Graph Interpretation
Part 3 The P Wave
Part 4 The PR Interval
Part 5, The QRS Complex
Part 6, The ST Segment