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Vertical P-wave axis: the electrocardiographic synonym for pulmonary emphysema and its severity Chhabra L; Sareen P; Perli D; Srinivasan I; Spodick DHIndian Heart J 2012[Jan]; 64 (1): 40-2BACKGROUND: The correlation between vertical P-wave axis (P-axis > 60 degrees ) and pulmonary emphysema was investigated on a very large controlled series to see if P-axis verticalisation as lone criterion can be effectively used to screen emphysema in general population. Correlation between degrees of P-axis verticalisation and the severity of the obstructive lung disease (as per global initiative for chronic obstructive lung disease [GOLD] criteria) was also studied to see if this criterion can be used for gross quantification of the chronic obstructive pulmonary disease (COPD) in routine clinical practice. MATERIALS AND METHODS: Around 6500 unselected, routine electrocardiograms (ECGs) were reviewed which yielded 600 ECGs with vertical P-axis in sinus rhythm. 635 ECGs from the same continuum were selected with P-axis 75 degrees as compared to the group with P-axis 60 degrees -75 degrees : 96.3% vs 4.6%. Close to 80% of the emphysema patients with P-axis > 85 degrees had very severe disease (FEV1 < 30%). CONCLUSION: P-axis verticalisation is highly effective for screening emphysema and degree of verticalisation provides a gross quantification of the disease.|*Electrocardiography[MESH]|Aged[MESH]|Aged, 80 and over[MESH]|Case-Control Studies[MESH]|Female[MESH]|Humans[MESH]|Male[MESH]|Mass Screening/*methods[MESH]|Middle Aged[MESH]|Predictive Value of Tests[MESH]|Prevalence[MESH]|Pulmonary Disease, Chronic Obstructive/*diagnosis/epidemiology[MESH]|Pulmonary Emphysema/*diagnosis/epidemiology[MESH]|Risk Factors[MESH]|Sensitivity and Specificity[MESH]|Severity of Illness Index[MESH]|Smoking/adverse effects/epidemiology[MESH] |
