Clubbing
Enlarged fingertips and nails resulting from chronic hypoxemia in congenital heart disease.
Full Definition
Clubbing is a physical sign characterized by enlargement and rounding of the fingertips and toes, with loss of the normal angle between the nail and nail bed. In congenital cardiology, clubbing develops as a consequence of chronic hypoxemia and decreased oxygen saturation, commonly seen in patients with cyanotic heart disease. The mechanism involves increased blood flow and tissue growth in response to hypoxic conditions. Digital clubbing typically develops over months to years and may be accompanied by cyanosis. The severity of clubbing often correlates with the degree and duration of hypoxemia, making it an important clinical indicator in cardiac assessment.
Usage
Usage note: Always specify digital clubbing when referring to this cardiac manifestation to distinguish from other uses of the term.
In Context
- "Physical examination revealed significant clubbing of the fingers consistent with chronic cyanotic heart disease." — Clinical Assessment
- "Progressive clubbing was noted at the six-month follow-up visit, prompting reassessment of oxygen saturation." — Follow-up Note