Dr Swathi R Bhat on Instagram: "Coronary CT angiogram (CCTA ) VS Coronary angiogram( CAG)! CCTA - non invasive (not going inside the body ) screening test /diagnostic test (In apparently normal individual or in selected symptomatic patients CCTA has the highest diagnostic accuracy for the detection of obstructive CAD, (>50 % narrowing ) It is highly sensitive and moderately specific ,detects the presence and extent of block and coronary plaque deposits Needs breathing holding for 5-10s and heart