Table 1.

Multilevel determinants of cardiac rehabilitation implementation during step 1 categorized by the Consolidated Framework of Implementation Research (CFIR) and Theoretical Domains Framework (TDF) domains.

Framework, domain, and construct				Cardiac rehabilitation determinant themes
				Clinic based		Home based or telehealth
CFIR
	Outer setting
		External policies	Social distancing guidelines		Reimbursement
		Patient needs and resources	Overwhelmed health care system		N/Aa
	Inner setting
		Relative priority	Nonessential service and provider redeployment		N/A
		Structural characteristics	Limited number of staff		N/A
		Available resources	Limited physical space and limited staff capacity		Limited staff capacity and hospital budget; lack of telehealth services, devices, and Wi-Fi access; and lack of home-based exercise equipment
		Compatibility	Inability to conduct group-based sessions		Inability to conduct group-based sessions and technological issues
TDF
	Motivation
		Emotion	Patient discomfort or fear of in-hospital services and provider burnout		N/A
		Beliefs about consequences	N/A		Patient safety
		Beliefs about capabilities	N/A		Ability to remotely monitor home-based sessions or use telehealth devices
	Capability
		Knowledge	N/A		Unfamiliarity with home-based or telemedicine model
		Decision-making	N/A		Triaging patients

^aN/A: not applicable.