Anything missing w Aldosterone? - goodman - Printable Version +- USMLE Forum - Largest USMLE Community (https://www.usmleforum.com) +-- Forum: USMLE Forum (https://www.usmleforum.com/forumdisplay.php?fid=1) +--- Forum: Step 1 (https://www.usmleforum.com/forumdisplay.php?fid=2) +--- Thread: Anything missing w Aldosterone? - goodman (/showthread.php?tid=843607) |
Anything missing w Aldosterone? - goodman - ArchivalUser - 08-19-2017 Primary Target tissue is the Kidney. Most important action to↑ Na+ reabsorption by Collecting Ducts Water is reabsorbed along with the Na+.Considered to control the amount of Na+ Rather than the Concentration of Na+ in the ECF Promotes the Secretion and Excretion of H+ by the Collecting Duct. Promotes the Secretion and Excretion of K+ by the Collecting Duct Affects also seen on the Distal Colon. Loss of 4 L of intestinal fluid cause ↓Extracellular Fluid (E.C.F.) = ↓ of Cardiac Output (C.O.) = ↓ B.P. = ↓ Renal Blood Flow (R.B.F.) ↓ of R.B.F. activates the renin-angiotensin system = ↑ the Angiotensin II that stimulate the secretion of ALDOSTERONE ↑ Aldosterone = ↑ Reabsorption of Salt (Sodium) and Water by the Kidney. 0 - ArchivalUser - 08-19-2017 A 68-year-old man has had worsening dyspnea and orthopnea for the past 3 years with increased production of frothy sputum. On examination, crackles are auscultated at lung bases. A chest radiograph shows bilateral interstitial infiltrates, distinct Kerley B lines, and a prominent left heart border. Laboratory studies show Na+, 135 mmol/L; K+, 3.8 mmol/L; Cl−, 99 mmol/L; CO2, 25 mmol/L; glucose, 76 mg/dL; creatinine, 1.5 mg/dL; and urea nitrogen, 30 mg/dL. Fractional excretion of sodium is less than 1%. Plasma renin, aldosterone, and antidiuretic hormone levels all are increased. Brain-type natriuretic peptide (BNP) is 200 pg/mL (normal 0 - ArchivalUser - 08-19-2017 A 68-year-old man has had worsening dyspnea and orthopnea for the past 3 years with increased production of frothy sputum. On examination, crackles are auscultated at lung bases. A chest radiograph shows bilateral interstitial infiltrates, distinct Kerley B lines, and a prominent left heart border. Laboratory studies show Na+, 135 mmol/L; K+, 3.8 mmol/L; Cl−, 99 mmol/L; CO2, 25 mmol/L; glucose, 76 mg/dL; creatinine, 1.5 mg/dL; and urea nitrogen, 30 mg/dL. Fractional excretion of sodium is less than 1%. Plasma renin, aldosterone, and antidiuretic hormone levels all are increased. Brain-type natriuretic peptide (BNP) is 200 pg/mL (normal 0 - ArchivalUser - 08-19-2017 Brain-type natriuretic peptide (BNP) is 200 pg/mL (normal |