Clinical Validation of the Defining Characteristics of the Nursing Diagnosis ‘Activity Intolerance’ in Patients With Acute Coronary Syndrome

The clinical validation of the defining characteristics of the activity intolerance diagnosis was conducted. This validation was based on operationalising each characteristic using commonly employed nursing scales and instruments. This process contributes significantly to the establishment of evidence-based nursing practices. The customisation of nursing diagnoses gains further ground through the validation studies of NANDA-I diagnoses. This process solidifies standardised nursing language as a valuable strategy in nursing care, providing substantial support for practical decision-making. Among the evaluators, EKG changes, generalised weakness and discomfort on exertion emerged as the most frequently encountered defining characteristics with substantial agreement. This discovery offers crucial insights for devising individualised and collective care plans within coronary units.