'Lone' atrial fibrillation precipitated by monosodium glutamate and aspartame.

Angina in the presence of intact coronary arteries remains a relatively frequent clinical issue. It is now well understood that an impairedcapacity to modulate coronary vascular resistances upon exercise (i.e. an impaired coronary flow reserve) may lead to ischemia and angina.We describe a case of coronary slow flow, i.e. a condition in which resting (micro) vascular resistances are inappropriately high, causingunstable angina. We propose that this novel syndrome should be called coronary syndrome Y to distinguish it from the better understoodcoronary syndrome X.© 2008 Elsevier Ireland Ltd. All rights reserved.