ABSTRACT
Hypocalcemia can be complicated, on rare occasions, by congestive heart failure and may also be associated with labor and lactation in some cases. Herein, we report a 30-year-old woman with hypocalcemia-induced heart failure secondary to primary idiopathic hypoparathyroidism precipitated by lactation. The patient presented with chest pain and paresthesia in both arms and legs during breast-feeding after her second delivery. She had severe hypocalcemia and low parathyroid hormone levels. Hypocalcemia-induced rhabdomyolysis further aggravated her hypocalcemia symptoms. The echocardiogram showed global hypokinesia with an ejection fraction of 47%. After calcium and vitamin D replacement, her symptoms and ventricular function improved. Hypocalcemia needs to be considered in patients with heart failure, because it is readily reversible. To the best of our knowledge, this is the first report of a patient with heart failure and rhabdomyolysis induced by primary hypoparathyroidism during lactation.