- CSC stands for Cardiac Surgery (Adult), an AACN Certification Corporation credential.
- It focuses narrowly on the first 48 hours after adult cardiac surgery.
- The exam has 90 multiple-choice questions (75 scored, 15 unscored) in 2 hours.
- Therapeutic Interventions carries the heaviest weight at 43% of the current test plan.
What CSC Literally Stands For
CSC stands for Cardiac Surgery (Adult). It is a nursing subspecialty certification, not a general critical-care license, and it exists to validate that a nurse can safely manage adult patients specifically during the first 48 hours after cardiac surgery. That narrow window is the entire reason the credential exists - it is not a broad "heart nurse" badge, and it is not interchangeable with certifications that share the same three letters but cover completely different fields.
If you landed here searching for what the acronym means in a healthcare context, this is the answer that matters: CSC = Cardiac Surgery (Adult), full stop. For a deeper walkthrough of the concept itself, see What Is CSC? and CSC Meaning.
Who Grants the CSC Credential
CSC is issued by AACN Certification Corporation, the credentialing arm of the American Association of Critical-Care Nurses (AACN). This is the same organization behind other well-known critical-care subspecialty certifications, and CSC sits alongside them as the credential dedicated to postoperative adult cardiac surgery care.
Because AACN Certification Corporation controls the exam blueprint, scoring, and renewal rules, every fact a candidate needs - fees, eligibility hours, passing cut score - traces back to that single source rather than to a testing vendor or third-party review company. Exams are delivered through PSI test centers or via Live Remote Proctoring, and the exam itself is closed-book.
Why This Certification Exists
Cardiac surgery patients are at their most physiologically unstable in the hours immediately following the operating room. Hemodynamic swings, bleeding risk, arrhythmias, and rapid ventilator weaning decisions all cluster into that early postoperative period. CSC was built to certify that a nurse has mastered this specific, high-acuity window rather than cardiac nursing broadly.
This is why the certification is sometimes described as narrow but deep: it does not test general cardiology knowledge or long-term cardiac rehabilitation. It tests what a bedside nurse must recognize and act on in the immediate aftermath of surgery, which is also why employers hiring for cardiovascular ICUs and cardiac surgery step-down units frequently list it as a preferred or required credential. See CSC Jobs for how the certification shows up in hiring language.
Exam Format Behind the Acronym
The CSC exam is a closed-book, multiple-choice test administered at PSI test centers or through Live Remote Proctoring. Understanding the mechanics helps explain why the acronym carries real weight professionally rather than being a paperwork credential.
- Question count: 90 total multiple-choice questions - 75 scored and 15 unscored (used for future exam development, not disclosed to candidates).
- Time limit: 2 hours.
- Passing cut score (current version): 55 of 75 scored questions correct.
- Initial exam fee: $150 for AACN members / $240 for nonmembers.
For the most recent testing year on record, 1,184 candidates sat for the first-time exam, with a 52.20% first-time pass rate. That figure is worth sitting with before you schedule your own attempt - a full breakdown is available in CSC Pass Rate 2026: What the Data Shows, and a candid difficulty assessment lives in How Hard Is the CSC Exam? Complete Difficulty Guide 2026.
Key Takeaway
With only 75 scored questions and a cut score of 55, each question carries real weight - there's little margin for skipping entire content areas during prep.
The Four Domains CSC Actually Tests
The letters "CSC" don't tell you what's actually on the exam - the domain weighting does. The current test plan, in effect from the January 31, 2022 version through November 18, 2026, breaks down as follows:
Domain 1: Procedures (11%)
Covers the surgical and procedural context nurses must understand to anticipate postoperative complications - bypass technique, valve repair/replacement approaches, and off-pump considerations.
- Recognizing how surgical approach shapes early recovery risk
Domain 2: Complications (33%)
Focuses on recognizing and responding to the complications most likely to occur in the first 48 hours - bleeding, tamponade, low cardiac output, arrhythmias, and neurologic events.
- Combined with Therapeutic Interventions, this domain makes up 76% of the current exam
Domain 3: Therapeutic Interventions (43%)
The single largest domain on the current exam. Covers hemodynamic management, vasoactive medications, mechanical support, ventilator management, and titration decisions during recovery.
- Deserves the largest share of your study time given its weight
Domain 4: Monitoring and Diagnostics (13%)
Covers interpretation of hemodynamic monitoring data, labs, imaging, and telemetry specific to the postoperative cardiac surgery patient.
- Often tested through waveform and data-interpretation style questions
A revised test plan takes effect for exams administered on or after November 19, 2026, shifting weights slightly: Procedures 9%, Complications 37%, Therapeutic Interventions 43%, and Monitoring and Diagnostics 11%. If you're scheduling your exam near that boundary, confirm which version applies to your date - practice materials and passing-cut guidance should always match the exam version you'll actually sit for. The full domain-by-domain breakdown, including sample topic lists, is covered in CSC Exam Domains 2026: Complete Guide to All 4 Content Areas.
| Domain | Current Weight (through Nov 18, 2026) | Revised Weight (Nov 19, 2026+) |
|---|---|---|
| Procedures | 11% | 9% |
| Complications | 33% | 37% |
| Therapeutic Interventions | 43% | 43% |
| Monitoring and Diagnostics | 13% | 11% |
Who Can Sit for CSC
The acronym only means something once you're eligible to earn it. AACN Certification Corporation requires an unencumbered U.S. RN or APRN license plus a current, nationally accredited clinical nursing specialty certification. Beyond licensure, candidates must document qualifying practice hours through one of two routes:
- Two-year route: 1,750 hours caring for acutely/critically ill adults within the previous 2 years, including 875 hours in the most recent year. Of the total, 875 hours must involve adults during the first 48 hours after cardiac surgery.
- Five-year route: 2,000 qualifying adult acute/critical-care hours within the previous 5 years, including 144 hours in the most recent year. Of the total, 1,000 hours must involve the first-48-hours postoperative population.
Applicants must also identify a clinical supervisor or RN/physician colleague who can verify their eligible practice hours if selected for audit. A full walkthrough of these pathways, including edge cases, is in CSC Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Keeping the Letters After Your Name
CSC certification lasts 3 years from the date earned. Renewal requires maintaining the qualifying license and base certification, logging 432 first-48-hours postoperative adult cardiac-surgery practice hours during the 3-year cycle (including 144 in the most recent year), and completing either 25 relevant Category A Clinical Judgment CERPs or retaking the renewal exam.
- CERP renewal fee: $75 member / $130 nonmember
- Exam renewal fee: $125 member / $170 nonmember
Understanding both the upfront and ongoing cost is part of deciding whether the credential fits your career plans - see CSC Certification Cost 2026: Complete Pricing Breakdown and Is the CSC Certification Worth It? Complete ROI Analysis 2026 for the full financial picture, and CSC Salary Guide 2026: Complete Earnings Analysis for how the credential fits into compensation conversations.
Why "CSC" Gets Confused With Other Credentials
Because the three letters "CSC" appear across multiple unrelated industries, candidates sometimes stumble onto study materials, fee schedules, or exam formats that have nothing to do with Cardiac Surgery (Adult). If a resource mentions details that don't match AACN Certification Corporation's published handbook - different fees, different question counts, different governing bodies - it almost certainly belongs to a different "CSC" entirely.
The safest way to avoid this mix-up is to anchor every fact you study to AACN's own materials and to resources that explicitly cover the nursing credential. Our CSC Cheat Sheet 2026: One-Page Review of Must-Know Facts consolidates only verified Cardiac Surgery (Adult) details for exactly this reason, and the broader What Is CSC Certification? and CSC Certification pages walk through the credential end to end.
Complications and Therapeutic Interventions
- These two domains alone make up 76% of the current exam - start here, not with Procedures
- Drill hemodynamic troubleshooting scenarios repeatedly
Monitoring and Diagnostics
- Practice interpreting hemodynamic waveforms and lab trends tied to postoperative complications
Procedures + full-length practice exam
- Review surgical technique basics last since it's the lightest-weighted domain
- Take a full 90-question timed practice run on CSC Exam Prep
For a complete week-by-week plan built around these domain weights rather than generic advice, see CSC Study Guide 2026: How to Pass on Your First Attempt. And once you know the material, understanding exactly what the scoring means - including how the 55-of-75 cut score is calculated - is covered in CSC Passing Score 2026: Exactly What You Need to Pass. You can also run timed practice questions modeled on the real domain weighting at CSC Exam Prep before exam day.
Frequently Asked Questions
CSC stands for Cardiac Surgery (Adult), a certification issued by AACN Certification Corporation for nurses caring for adults in the first 48 hours after cardiac surgery.
No. CSC is a subspecialty certification focused narrowly on postoperative adult cardiac surgery care, distinct from broader critical-care certifications, though it also comes from AACN Certification Corporation and requires a current specialty certification as an eligibility prerequisite.
The CSC exam contains 90 multiple-choice questions total: 75 are scored and 15 are unscored, delivered within a 2-hour time limit.
The current passing cut score is 55 out of 75 scored questions, based on the January 31, 2022 exam version, which remains applicable through November 18, 2026.
Yes. A revised test plan applies to exams administered on or after November 19, 2026, adjusting domain weights to Procedures 9%, Complications 37%, Therapeutic Interventions 43%, and Monitoring and Diagnostics 11%.