It seems emotions such as joy, enthusiasm and contentment are protective factors against heart disease.
On the flip side, research reveals individuals who feel depressed or experienced social isolation are at far greater risk of developing heart disease.
Davidson KW, Mostofsky E, Whang W. Don’t worry, be happy: positive affect and reduced 10-year incident coronary heart disease: the Canadian Nova Scotia Health Survey. Eur Heart J. 2010 May;31(9):1065-70.
Bunker SJ, Colquhoun DM, Esler MD, et al. “Stress” and coronary heart disease: psychosocial risk factors. Med J Aust. 2003 Mar 17;178(6):272-6.