Fig. 1
From: Intracoronary injection of nitroglycerine can prevent unnecessary percutaneous coronary intervention
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12872-022-02823-2/MediaObjects/12872_2022_2823_Fig1_HTML.jpg)
A Coronary angiography of a 74 year old man showing stenosis in the mid section of the left anterior descending artery that resolved after intracoronary nitroglycerine injection (B). C Coronary angiography of a 75 year old woman showing stenosis in the mid section of the left anterior descending artery that did not resolve after administration of intracoronary nitroglycerine (D)