Impending cardiac catheterisation substantially increased plasma adrenaline and noradrenaline levels compared to controls, but did not alter electrocardiographic or other physiological parameters.
Observational (n=37)
Plasma catecholamine concentrations were estimated in a group of 17 fasting patients immediately before and 3 days after cardiac catheterisation. At both times electrocardiograms were recorded and blood pressures, heart rates, and respiration rates measured. Control catecholamine values were established in a group of 10 male and 10 female volunteers, bled at the same time of day under the same conditions of nutrition and posture. Levels of adrenaline and noradrenaline were increased substantially before catheterisation; 3 days later, the values were comparable to those of the control group, though still marginally higher. The increments in catecholamine levels were independent of sex and of the presence or otherwise of persistent supraventricular arrhythmias. In spite of the considerably raised catecholamine levels, electrocardiographic patterns remained unchanged, as did the other physiological values. The absence of any relation between enhanced catecholamine secretion and physiological effects is considered to be the result either of enhanced parasympathetic activity or of adaptation to a prolonged period of stress.
Turton et al. (1977) conducted an observational in Cardiac catheterisation (n=37). Impending cardiac catheterisation vs. Healthy volunteers and 3 days post-catheterisation was evaluated on Plasma catecholamine concentrations and physiological parameters. Impending cardiac catheterisation substantially increased plasma adrenaline and noradrenaline levels compared to controls, but did not alter electrocardiographic or other physiological parameters.