• Sheraz Hussain Medical College, Aga Khan University, Karachi
  • Mohammad Faizan Zahid Medical College, Aga Khan University, Karachi
  • Arshalooz Jamila Rahman Department of Paediatrics and Child Health, Aga Khan University, Karachi
  • Mehnaz Atiq Ahmed Department of Paediatrics and Child Health, Aga Khan University, Karachi
  • Shahnaz Hamid Ibrahim Department of Paediatrics and Child Health, Aga Khan University, Karachi


Mumps is an acute viral illness that follows a self-limiting course but up to 10% of cases have a complicated course with the involvement of other organ systems. Myocarditis is reported as a complication but the incidence has greatly fallen ever since the development of the mumps vaccine. A child presented to our department with parotid swelling and fever. Persistent tachycardia with irregular pulse led to further cardiac work up which showed decreased ejection fraction and raised serum cardiac enzymes, indicating myocardial damage. With ionotropic agents and supportive care, there was complete normalization of ejection fraction and serum cardiac enzyme levels. He was discharged within a week of admission. This case highlights the importance of suspecting myocarditis in the setting of mumps, a diagnosis that precludes early suspicion in mumps patients suffering from cardiac symptoms not explained by other potential aetiologies. Early suspicion and timely supportive care are essential to ensure favourable outcomes.


Galazka AM, Robertson SE, Kraigher A. Mumps and mumps vaccine: a global review. Bull World Health Organ 1999;77(1):3–14.

Leonidas JC, Athanasiades T, Zoumboulakis D. Mumps myocarditis: Case report. J Pediatr. 1966;68(4):650–3.

Hviid A, Rubin S, Mühlemann K. Mumps. Lancet 2008;371(9616):932–44.

Bengtsson E, Örndahl G. Complications of mumps with special reference to the incidence of myocarditis. Acta Med Scand 1954;149(5):381–8.

Laurence D, McGavin D. Complications of Mumps. Br Med J 1948;1(4541):94–7.

Arita M, Ueno Y, Masuyama Y. Complete heart block in mumps myocarditis. Br Heart J 1981;46(3):342–4.

Bland JH. Mumps complicated by myocarditis, meningoencephalitis and pancreatitis: review of the literature and report of a case. N Engl J Med 1949;240(11):417–9.

Brown NJ, Richmond SJ. Fatal mumps myocarditis in an 8-month-old child. Br Med J 1980;281(6236):356–7.

Kabakus N, Aydinoglu H, Yekeler H, Arslan IN. Fatal mumps nephritis and myocarditis. J Trop Pediatr 1999;45(6):358-60.

Rosenberg DH. Electrocardiographic Changes in Epidemic Parotitis (Mumps). Exp Biol Med 1945;58(1):9–11.

Pujol M. Oreillons et myocardite. Arch Med Pharm Mil 1918;69:527–38.

Rosenberg DH. Acute myocarditis in mumps (epidemic parotitis). Arch Intern Med (Chic) 1945;76(5):257–63.

Dennert R, Crijns HJ, Heymans S. Acute viral myocarditis. Eur Heart J 2008;29(17):2073–82.

Levi D, Alejos J. Diagnosis and treatment of pediatric viral myocarditis. Curr Opin Cardiol 2001;16(2):77–83.

Schultz JC, Hilliard AA, Cooper lt Jr, Rihal CS. Diagnosis and treatment of viral myocarditis. Mayo Clin Proc 2009;84(11):1001–9.

Baandrup U, Mortensen SA. Fatal mumps myocarditis. Acta Med Scand 1984;216(3):331–3.

Ozkutlu S, Soylemezoglu O, Calikoglu AS, Kale G, Karaaslan E. Fatal mumps myocarditis. Jpn Heart J 1989;30(1):109–14.