cliot (version 1.0.0)

ccs_angina_grade: Canadian Cardiovascular Society (CCS) Angina Grade

Description

Determines the Canadian Cardiovascular Society (CCS) grading of angina pectoris. This standard classification system grades the severity of exertional angina based on the threshold of physical activity at which symptoms occur, ranging from Grade I (least severe) to Grade IV (most severe).

Usage

ccs_angina_grade(inability_or_rest, marked_limitation, slight_limitation,
                 strenuous_only)

Value

A list containing:

CCS_Grade

The calculated CCS Grade (I, II, III, or IV).

Description

The clinical definition associated with the assigned grade.

Arguments

inability_or_rest

Numeric (0 or 1). Grade IV Criterion: Inability to carry on any physical activity without discomfort, OR angina syndrome is present at rest. (1 = Yes).

marked_limitation

Numeric (0 or 1). Grade III Criterion: Marked limitation of ordinary physical activity. Angina occurs on walking 1-2 blocks on the level and climbing 1 flight of stairs in normal conditions and at a normal pace. (1 = Yes).

slight_limitation

Numeric (0 or 1). Grade II Criterion: Slight limitation of ordinary activity. Angina occurs on walking >2 blocks on the level and climbing >1 flight of stairs in normal conditions and at a normal pace. (1 = Yes).

strenuous_only

Numeric (0 or 1). Grade I Criterion: Ordinary physical activity (walking, climbing stairs) does not cause angina. Angina occurs with strenuous, rapid, or prolonged exertion. (1 = Yes).

References

Campeau L. Grading of angina pectoris. Circulation. 1976;54(3):522-523. doi:10.1161/01.cir.54.3.522

Examples

# Example 1: Severe Angina
# Patient has angina at rest
ccs_angina_grade(1, 0, 0, 0)

# Example 2: Moderate Angina
# Patient can walk 1-2 blocks but has marked limitation
ccs_angina_grade(0, 1, 0, 0)