Physicians were less knowledgeable than nurses and support staff in BLS/ACLS guidelines as reflected by their lower scores in this study. Lack of strict professional accreditation policies in India and limited enthusiasm to refresh BLS/ACLS skills among subset of physicians over time could be contributory factors. In this study, BLS and ACLS training were seen to only marginally enhance the mean scores by 8.1%, as against a two-thirds improvement (68.4%) of knowledge and skill of CPR following BLS training as reported by Chaudhari et al. This may be due to the inconsistent time lag between BLS/ACLS training received by participants and this study, whereas most other studies compared knowledge gain by virtue of a pre-training and an immediate post-training questionnaire. BLS/ACLS training was however seen to have significant impact only among nursing population in this study. This may be attributable to the fact that nurses who are keen to migrate to other countries for professional satiety are compelled to update their knowledge of BLS/ACLS guidelines. Though not statistically significant, the mean scores were unexpectedly low after training in BLS/ ACLS among support staff. This may be due to lack of formal professional education and lack of frequent patient exposure or regular practice of BLS/ACLS and is a plausible research area worth further exploration. A majority of healthcare professionals (77.2%) in our study recommended that BLS/ACLS training should to be part of professional healthcare curriculum, Sinha et al[9] study where 96% of medical students and interns stressed the same.