URINARY EXCRETION OF METABOLITES OF CATECHOLAMINES IN NORMAL INDIVIDUALS AND HYPERTENSIVE PATIENTS

Area of Science:

• Biochemistry
• Clinical Chemistry
• Endocrinology

Background:

• Hypertension is a significant cardiovascular risk factor.
• Pheochromocytoma is a rare tumor causing excess catecholamine release.
• Accurate biochemical markers are crucial for diagnosis and management.

Purpose of the Study:

• To determine 24-hour urinary 3-methoxy-4-hydroxy mandelic acid (V.M.A.) output in normal adults, hypertensive patients, and pheochromocytoma cases.
• To compare V.M.A. excretion patterns with urinary catecholamines and methylated amines in pheochromocytoma.
• To correlate findings with radioactive adrenaline and noradrenaline metabolism.

Main Methods:

• Quantitative analysis of 24-hour urinary V.M.A. levels.
• Measurement of urinary catecholamines and methylated amines.
• Utilizing radioactive tracers (adrenaline and noradrenaline) for metabolic pathway analysis.

Main Results:

• Established baseline V.M.A. excretion in normal subjects.
• Observed altered V.M.A. levels in hypertensive patients.
• Demonstrated characteristic V.M.A. and catecholamine profiles in pheochromocytoma.
• Corroborated findings with radioactive tracer studies.

Conclusions:

• Urinary V.M.A. is a valuable diagnostic marker for pheochromocytoma.
• V.M.A. measurements aid in understanding catecholamine metabolism in hypertensive disorders.
• The study provides a comprehensive analysis of V.M.A. in various clinical conditions.