This book is timely and challenging. Within its pages are commentaries and opinions on the scientific background and explanatory ideas for a complex of symptoms and investigations known as syndrome X. The commonest cause by far of angina pectoris is coronary artery obstruction due to atheromatous lesions both within the wall of the artery and intruding into the lumen; in such patients it is expected that there maybe ST segment depression on atrial pacing or on an exercise test indicating myocardial ischemia. Syndrome X was a term first used in an editorial written by Kemp in 1973. He was...