Singh, R., Kashyap, R., Bhardwaj, R., Marwaha, R., Thakur, M., Singh, T.P., Kalawar, R. and Kumar, S. 2017. The clinical and etiological profile of atrial fibrillation after echocardiography in a tertiary care centre from North India - a cross sectional observational study. International Journal of Research in Medical Sciences. 5, 3 (Feb. 2017), 847–850. DOI:https://doi.org/10.18203/2320-6012.ijrms20170623.