The Cardiac Care Bridge randomized trial in high-risk older cardiac patients: A mixed-methods process evaluation.

Aim: To evaluate healthcare professionals' performance and treatment fidelity in the Cardiac Care Bridge (CCB) nurse-coordinated transitional care intervention in older cardiac patients to understand and interpret the study results.

Design: A mixed-methods process evaluation based on the Medical Research Council Process Evaluation framework.

Methods: Quantitative data on intervention key elements were collected from 153 logbooks of all intervention patients.