Chest PainAngina PectorisPainMyocytes, CardiacPain ManagementChronic PainElectrocardiographyPain ThresholdCardiac OutputHeartPain, PostoperativePain MeasurementChest TubesBack PainLow Back PainRadiography, ThoracicPain ClinicsMyocardial InfarctionAbdominal PainArrhythmias, CardiacPain, IntractableCardiac Surgical ProceduresThoracic WallNeck PainCoronary AngiographyMicrovascular AnginaPain, ReferredDeath, Sudden, CardiacEmergency Service, HospitalThoraxProspective StudiesTime FactorsPelvic PainPain PerceptionTomography, X-Ray Computed