I'm about 10 weeks out from my CIR exam and working through the ARRT content specifications. The cardiac interventional content is where I'm most comfortable — I've been doing cath lab work for 8 years — but the hemostasis and pharmacology sections are where I'm spending most of my study time because the depth on the actual exam is unclear to me.
Specifically, I'm trying to figure out whether the pharmacology questions are more about drug classes and general mechanisms, or whether they get into specific dosing protocols, contraindications, and reversal agents at a granular level. Things like the differences between UFH and LMWH mechanisms, antiplatelet therapy monitoring, and the management of heparin-induced thrombocytopenia — all theoretically within scope but I'm not sure how deeply they're tested.
My practice scores are around 79-81% overall, which is above the 75% pass threshold but not by a margin I'm comfortable with. The radiation physics and equipment sections are my weakest areas — I'm getting about 68% there and I know I need to bring that up. But I don't want to abandon pharmacology prep if the exam goes deeper than I expect.
I've also heard the patient care and contrast media questions can be more involved than they appear in the content outline. Anyone who's sat for the CIR recently have a sense of how the pharmacology section felt relative to the official weighting? I'd rather calibrate my prep time on actual exam experience than just the stated percentages.
The radiation physics section being your weakest at 68% is the more pressing issue at 10 weeks out. That content is more memorizable than clinical judgment questions and there's a clear study path for it. I'd prioritize bringing that up to 78-80% before your exam and treat pharmacology as maintenance review.
HIT management did come up for me — not dosing specifics but the mechanism, when to suspect it, and what to switch to. That's the kind of question where knowing the clinical logic matters more than memorizing numbers. The ARRT practice exam aligned pretty well with the real exam difficulty in my experience, so if you're using that as a benchmark you're in reasonable shape.
Eight years of cath lab experience is a real asset for the procedural and patient care content. The equipment questions might feel more abstract because knowing how something works in practice doesn't always translate to the physics-level explanation the exam wants. Working through image quality and detector technology from a formal textbook perspective rather than from practical experience helped me close that gap faster than I expected.
I took it about 14 months ago. The pharmacology questions were more mechanism and class-level than dosing-specific — they want to know that you understand how anticoagulants work and when you'd use one over another, not that you've memorized weight-based heparin protocols. That said, reversal agents and management of bleeding complications came up in a few scenario questions.
I'm in a pretty similar boat — 8 years in the cath lab myself, so the cardiac stuff felt like review, but hemostasis pharmacology humbled me fast. What I found is it gets surprisingly specific: think mechanism of action for anticoagulants like heparin and bivalirudin, reversal agents, monitoring parameters, that kind of thing. It's not surface-level. I work nights, so I basically carved out 45 minutes every morning before my kids woke up and hit one topic at a time. Slow, but it stuck better than cramming ever did for me.
Honestly the thing that helped me build confidence before diving into the deep stuff was doing a lot of practice questions first so I could see where my gaps actually were. I used these free cir interventional radiology techniques procedures questions early on and they gave me a good sense of how the exam frames things, especially around pharmacology. Once you see the question style you'll stop over-studying the wrong details. You've got 10 weeks, that's plenty of time if you're consistent.
Honestly, I almost bailed on the hemostasis section three weeks out because I couldn't figure out how deep they actually go. It's not as wild as it looks. They want you to know the mechanism of action for the major anticoagulants and antiplatelet agents, reversal agents, and when things like heparin vs bivalirudin matter in the cath lab, but they're not asking you to memorize pharmacokinetic curves. Once I stopped trying to learn everything and focused on clinical application it clicked. I used a bunch of free practice material including the free cir interventional radiology techniques procedures questions and they actually matched the level of detail on the real exam pretty well.
You've got 8 years in the cath lab so you already know how this stuff works in practice. That's your advantage. Don't overthink the pharm section — tie every drug back to something you've seen at the table and it stops feeling abstract. I passed with more room than I expected on that domain.