Multicentric, prospective, non-interventional observational study with two parts:

1. A register of quality assurance within the recertification of clinics
2. An extended register with scientific protocol.

1. Quality assurance

   As a quality-assuring basic register, the CPU II register checks the extent to which certified Chest Pain Units fulfill the criteria published by the DGK. In particular, the following quality dimensions are evaluated:

   • Indication quality
   • Diagnostic quality
   • Therapeutic quality
   • Structural quality / networking

2. Platform for projects with a scientific focus

The CPU II register and the infrastructure provided are a platform for further projects with scientific questions (scientific protocol = WP):

WP: Clinical history after CPU (PCI data / discharge / 12-month FUP) in patients with leading cardiac diagnosis

Inclusion Criteria:

• CPU patient
• > 18 years
• Written consent of the patient

Exclusion Criteria:

• Denied consent

Basic register:

All patients who are admitted to a CPU.

Scientific Protocol:

All patients who are admitted to a CPU and have their consent to participate in a follow-up (in patients with leading cardiac diagnosis).