Impact of Prone Position on 12-Lead Electrocardiogram in Healthy Adults: A Comparison Study with Standard Electrocardiogram

Table 3

Effect of prone position on QRS morphology and T wave polarity in precordial leads.

Precordial leads		Supine position ECG	Prone position ECG
V1	QRS morphology	RS in 77.5% of cases	QR in 72.5% of cases
	T wave polarity	Negative in 70% of cases	Negative in 95% cases
V2	QRS morphology	RS in 70% of cases	QR in 90% of cases
	T wave polarity	Positive in 95% of cases	Negative in 47.5% cases
V3	QRS morphology	RS in 52% of cases	QR in 100 of cases
	T wave polarity	Positive in 95% of cases	Negative in 95% of cases

Data are expressed as percentages. Statistical significance of differences calculated using the Pearson’s chi-square (χ²) test.