Brachial artery low-flow-mediated constriction is increased early after coronary intervention and reduces during recovery after acute coronary syndrome: characterization of a recently described index of vascular function. - Spiro, JR; Digby, J; Ghimire, G; Mason, M; Mitchell, A; Ilsley, C; Donald, A; Dalby, M; Kharbanda, R (European heart journal, 2011)