Electrolyte Disturbances in SARS-CoV-2 Infection

Area of Science:

• Nephrology
• Infectious Diseases
• Critical Care Medicine

Background:

• The COVID-19 pandemic, caused by SARS-CoV-2, presents with diverse complications, including renal involvement and electrolyte disturbances.
• Hypokalemia (low potassium levels) has been frequently observed in patients with SARS-CoV-2 infection, particularly in initial cohorts.

Purpose of the Study:

• To review current evidence on hypokalemia in SARS-CoV-2 infection.
• To explore potential pathophysiological mechanisms linking SARS-CoV-2 to hypokalemia.
• To discuss clinical implications and diagnostic approaches for hypokalemia in COVID-19 patients.

Main Methods:

• Review of emerging clinical and histopathological data related to SARS-CoV-2 infection and hypokalemia.
• Analysis of potential mechanisms, including renin-angiotensin-aldosterone (RAS) system activation.
• Discussion of the utility of the transtubular potassium gradient (TTKG) in assessing hypokalemia risk.

Main Results:

• Hypokalemia is a common finding in SARS-CoV-2 infection, with multifactorial causes.
• Evidence supports the involvement of renin-angiotensin-aldosterone (RAS) system activation in SARS-CoV-2-induced hypokalemia.
• The transtubular potassium gradient (TTKG) is highlighted as an important tool for risk stratification.

Conclusions:

• Hypokalemia in SARS-CoV-2 infection is complex and challenging to manage.
• Understanding the role of RAS activation is key to elucidating hypokalemia mechanisms.
• Calculating TTKG aids in identifying patients at risk for hypokalemia and its associated complications.