Diagnostic Cardiac Catheterization

Coronary and sometimes ventricular angiography without intervention — used to characterize coronary anatomy before CABG, assess graft patency, evaluate cardiomyopathy, or investigate unexplained heart failure. Increasingly supplanted for anatomy-only questions by coronary CTA, but remains the standard when functional assessment (FFR, iFR) or an intervention pathway is anticipated.

Clinical pathway

Radial access (default) or femoral, short sheath.
Coronary catheter selection — JL4 / JR4 diagnostic catheters for left / right coronary, engage ostia under fluoroscopy.
Contrast cineangiograms — standard 6–8 views: LAO / RAO cranial and caudal angulations to open bifurcations.
LV gram if indicated — pigtail catheter, power injection, assess wall motion and EF.
Hemodynamics — right-heart catheterization in selected cases (PA pressures, cardiac output, oximetry).
Closure — radial band, femoral manual compression, or closure device.

Typical systems

Philips Azurion 3 (single-plane diagnostic)
Philips Azurion 5
Philips Allura Xper FD10 — large refurb base in diagnostic-only rooms
GE Innova 2100-IQ
Siemens Artis zee
Siemens Artis Q

Room + procedure characteristics

Procedure time: 20–40 min.
Contrast: 50–100 ml typical; watched carefully in CKD.
Dose: short fluoro time, low relative to PCI.

Equipment considerations that bite

Detector size sets the room. FD10 (small detector) rooms are diagnostic / cardiac-focused; FD20 rooms cover peripheral and larger-FOV work but cost more. A diagnostic program in an FD20 room is usable but over-spec'd.
Dose-management software — ClarityIQ (Philips), CARE / CLEAR (Siemens), AutoEx + Innova Vision (GE). Cardiology programs care about cumulative operator dose; modern dose-reduction stacks materially shift career exposure.
Hemodynamics integration — Sensis (Siemens), Xper IM (Philips), Mac-Lab (GE) are separate licensed modules with their own service domain. A "fully working cath lab" with broken hemodynamics is a stopped room.
Tube class — diagnostic-only rooms run far below the duty cycle of high-PCI rooms; a refurb tube is a reasonable risk on a diagnostic room and a poor one on an interventional cardiology lab.
Image-record storage — DICOM cine storage volume is non-trivial; a refurb without modern storage hits PACS limits fast.

Operational reality

Diagnostic cath increasingly precedes PCI in the same case. A pure-diagnostic room may convert to ad-hoc PCI; the equipment must support the upgrade or the patient transfers — neither is great.
Throughput is access / closure / monitoring time, not fluoro. Adding a diagnostic-only room rarely doubles volume; the bottleneck is the holding bay.
Coronary CTA cannibalization is real. Volume in pure diagnostic cath has been declining for a decade in many markets; refurb economics reflect this.