In this video, Dr. Atul Verma, Head Dept.of Nuclear Medicine, Fortis Hospital, New Delhi, will talk about the importance of nuclear medicine in cardiology. Nuclear medicine is very important in cardiology. Coronary angiography is a gold standard for patients with coronary vasculature. Coronary angiography is for anatomical blockages whereas myocardial perfusion imaging is for physiological aspects. Dr. Atul will discuss how they are complimentary to each other.  He will talk about ischemic cascade and explain the process how it develops. Depending upon the percentage of blockage shown by coronary angiography, appropriate interventions are done.