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. Author manuscript; available in PMC: 2015 Dec 1.
Published in final edited form as: COPD. 2014 Jul 1;11(6):670–680. doi: 10.3109/15412555.2014.898047

Figure 1.

Figure 1

Electrocardiographic characteristics of COPD patients without and with PH.

Panel A corresponds to the ECG of a COPD patient without PH (mean PAP 17 mm Hg, heart rate 81 bpm, PR interval 124 ms, QRS complex duration 76 ms, QTc interval 401 ms, QRS axis + 37° and T wave axis + 70°). Panel B shows the ECG of a COPD patient with PH (mean PAP 65 mmHg, heart rate 63 bpm, PR interval 216 ms, QRS complex duration 84 ms, QTc interval 409 ms, QRS axis + 72° and T wave axis − 22°).

In the ECG of the COPD patient with PH (panel B) the PR interval (PR) is longer, the P wave (P) in V1 and the S wave in lead I are of larger amplitude. In addition, there are negative T waves in the inferior leads (*).