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Table 1 Respiratory comparison in the ECG variables of the pre- and post- treatment of tube thoracostomy

From: Electrocardiographic manifestations in a large right-sided pneumothorax

ECG variables Inspired Expired
Pre HR (bpm) 91 88
Post HR (bpm) 54 56
Pre PR interval (ms) 148 138
Post PR interval (ms) 148 156
Pre QRS duration (ms) 86 88
Post QRS duration (ms) 88 86
Pre QTc interval (ms) 429 426
Post QTc interval ( ms ) 417 419
Pre P-wave axis (°) 92 98
Post P-wave axis (°) 23 43
Pre QRS axis (°) 62 40
Post QRS axis (°) 64 22
Pre T-wave axis (°) 70 69
Post T-wave axis (°) 63 42
Pre RV5 (mV) 1.5 3.14
Post RV5 (mV) 1.29 1.65
Pre SV1 (mV) 1.08 0.76
Post SV1 (mV) 1.19 1.26
Pre RV5 + SV1 (mV) 2.59 3.9
Post RV5 + SV1 (mV) 2.48 2.91
Pre PII (mV) 3 3
Post PII (mV) 1 1
  1. ECG electrocardiogram, HR heart rate, QTc corrected QT, RV5 R-wave voltage in V5, SV1 S-wave voltage in V1, PII P-wave voltage in II, bpm beats/min