Hyponatremia is a common electrolyte disorder associated with potentially serious or life-threatening consequences. Serum osmolality and sodium concentration [Na+] are regulated by thirst, the hormone arginine vasopressin (AVP), and renal water and sodium handling. Hyponatremia is frequently caused by dysregulation of AVP, which accompanies disorders of water retention, such as congestive heart...

INTRODUCTION On Sunday, December 2, 2001, in the comic section of the Chicago Tribune, the Peanuts comic strip dealt with hyponatremia. Team doctor Snoopy trotted out onto the field and deduced that Woodstock was suffering from hyponatremia. Snoopy correctly determined that this electrolyte imbalance could be corrected by the right combination of water and salt. Woodstock was allowed to drink t...

BACKGROUND AND OBJECTIVES Hyponatremia has been identified as a relevant factor for cognitive impairment but has not been investigated in patients receiving peritoneal dialysis (PD). This study investigated the relationship between hyponatremia and cognitive functions in PD patients. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS A total of 476 clinically stable patients from five PD units who...

PURPOSE One-third of patients with lung cancer and hyponatremia have no evidence of ectopic arginine vasopressin (AVP) production and the cause of their hyponatremia is not conclusively established. We sought to distinguish patients with hyponatremia caused by elevated AVP versus those with ectopic atrial natriuretic peptide (ANP) via this detailed metabolic study. EXPERIMENTAL DESIGN We enro...

BACKGROUND Mild hyponatremia is relatively common in patients hospitalized with heart failure (HF). To our knowledge, the association of hyponatremia with outcomes has not been evaluated in the context of in-hospital clinical course including central hemodynamics and changes in serum sodium level. METHODS The ESCAPE trial (Evaluation Study of Congestive Heart Failure and Pulmonary Artery Cath...

OBJECTIVES/HYPOTHESIS To analyze the incidence and severity of hyponatremia in patients receiving synthetic desmopressin (DDAVP) in the perioperative setting of oropharyngeal surgery in the treatment of von Willebrand disease and to propose a standardized protocol for perioperative fluid resuscitation and postoperative sodium monitoring after DDAVP administration. STUDY DESIGN Retrospective m...

Hyponatremia is one of the most common electrolyte disorders encountered in the elderly. We present the case of an 81-year-old man who developed hyponatremia due to isolated hypoaldosteronism occurring after licorice withdrawal. He had severe hypokalemia with hypertension and was diagnosed with pseudoaldosteronism. He had been taking a very small dose of licorice as a mouth refresher since his ...

Exercise-associated hyponatremia has been described after sustained physical exertion during marathons, triathlons, and other endurance athletic events. As these events have become more popular, the incidence of serious hyponatremia has increased and associated fatalities have occurred. The pathogenesis of this condition remains incompletely understood but largely depends on excessive water int...

Duloxetine is a relatively balanced selective serotonin and noradrenaline reuptake inhibitor. We report a case of hyponatremia induced by duloxetine developed rapidly after starting the medication in a middle-aged male with multiple somatic symptoms and depression. Two days after discontinuation of duloxetine and management with hypertonic saline as well as fluid restriction, the serum sodium l...

T is one of the most commonly used immunosuppressive drugs but tacrolimus-induced severe symptomatic hyponatremia is not a well-documented issue in kidney transplant patients. In our current report, we describe a case of tacrolimus-induced hyponatremia in a living donor kidney recipient in whom any other potential cause of hyponatremia was excluded, and tacrolimus-induced salt losing nephropath...