- CSC stands for Cardiac Surgery (Adult), an AACN Certification Corporation credential for the first 48 hours post-op.
- The exam has 90 multiple-choice questions (75 scored, 15 unscored) in a 2-hour window.
- Therapeutic Interventions carries the heaviest domain weight at 43% of the current test plan.
- Two eligibility routes exist: a 2-year, 1,750-hour path or a 5-year, 2,000-hour path.
What Does CSC Mean?
CSC stands for Cardiac Surgery (Adult), a nursing subspecialty certification issued by AACN Certification Corporation, the credentialing arm of the American Association of Critical-Care Nurses (AACN). It is not a general critical-care credential and it is not tied to a broad ICU scope. CSC is deliberately narrow: it validates a nurse's expertise in caring for adult patients during the first 48 hours after cardiac surgery, the window when hemodynamic instability, bleeding, arrhythmias, and rapid physiological shifts are most likely.
If you have seen "CSC" used elsewhere to describe an unrelated credential, that is a different acronym collision entirely - on this site, CSC always refers to Cardiac Surgery (Adult). Everything below reflects that specific certification, including its exam structure, fees, and renewal rules.
Who Administers the CSC Credential
AACN Certification Corporation administers CSC. The exam is delivered as a closed-book test, available either at PSI test centers or through Live Remote Proctoring, giving candidates flexibility in how they sit for it. Because AACN Certification Corporation issues several related subspecialty credentials, candidates sometimes assume the requirements are interchangeable - they are not. CSC has its own eligibility routes, its own domain weighting, and its own renewal cycle, distinct from AACN's other certifications.
For a deeper walkthrough of what the credential itself represents and how it fits into the broader AACN certification family, see CSC Certification.
Who Earns CSC Certification (and Why Employers Value It)
CSC is designed for RNs and APRNs who spend meaningful clinical time with adult patients recovering from cardiac surgery - typically in cardiovascular ICUs, cardiac surgical step-down units, and dedicated post-cardiotomy recovery areas. Because the certification requires a current, nationally accredited clinical nursing specialty certification as a prerequisite, it functions as a layered credential: it signals that a nurse has already established baseline critical-care competency and has gone further to specialize in the highest-acuity post-cardiac-surgery window.
Hospitals with cardiac surgery programs, cardiovascular ICUs, and Magnet-status facilities often look favorably on CSC-credentialed staff because the certification maps directly to a well-defined, high-stakes clinical population. For nurses evaluating whether pursuing the credential makes sense for their career trajectory, it's worth reviewing Is the CSC Certification Worth It? Complete ROI Analysis 2026 and CSC Salary Guide 2026: Complete Earnings Analysis before committing time and money to the application process.
To browse how the credential appears in postings and what units typically seek it, see CSC Jobs.
Exam Format, Fees, and Registration
The CSC exam consists of 90 multiple-choice questions, of which 75 are scored and 15 are unscored (used for future item development, though candidates cannot identify which is which). The exam window is 2 hours, and it is closed-book, meaning no external references are permitted during testing.
Initial exam fees are $150 for AACN members and $240 for nonmembers. Passing requires answering 55 of the 75 scored questions correctly under the current cut score. That threshold and the current domain weighting both apply to the examination version that launched January 31, 2022, and remain in effect through November 18, 2026 - after which a revised blueprint takes over.
Key Takeaway
If you're scheduling your exam near the November 2026 transition date, confirm which blueprint version applies to your sitting before you build a study plan - the domain weights shift meaningfully at that point.
Because the exam questions are multiple-choice and closed-book, success depends less on memorizing reference values from a manual and more on applying clinical reasoning under time pressure - roughly 80 seconds per scored question on average. For a full breakdown of what "passing" actually requires numerically, see CSC Passing Score 2026: Exactly What You Need to Pass, and for registration windows and scheduling logistics, see CSC Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
The Four CSC Exam Domains
The CSC test plan currently in effect (through November 18, 2026) breaks the exam into four content domains. Understanding how much weight each domain carries should directly shape how you allocate study time.
Domain 1: Procedures - 11%
Covers the surgical and procedural context nurses need to interpret what was done to the patient and why it changes postoperative risk.
- Surgical approach and its implications for early recovery
- Device and line placement relevant to the first 48 hours
Domain 2: Complications - 33%
Focuses on recognizing and responding to the complications most likely to emerge in the immediate postoperative period.
- Bleeding, tamponade, and arrhythmia recognition
- Hemodynamic instability and low cardiac output states
Domain 3: Therapeutic Interventions - 43%
The largest domain by far, covering the interventions nurses must initiate or support during recovery.
- Vasoactive and inotropic support titration
- Mechanical circulatory support and ventilatory management
Domain 4: Monitoring and Diagnostics - 13%
Tests the ability to interpret invasive and noninvasive data streams unique to post-cardiac-surgery patients.
- Hemodynamic waveform interpretation
- Lab trends signaling early complications
These weights are not permanent. For exams administered on or after November 19, 2026, AACN shifts the plan to Procedures 9%, Complications 37%, Therapeutic Interventions 43%, and Monitoring and Diagnostics 11%. Complications gains weight while Procedures loses a bit - a subtle but real shift in emphasis. Always keep your practice-test blueprint and scoring guidance matched to your actual exam date; using an outdated version to prepare is a common and avoidable mistake. For a domain-by-domain deep dive with sample content and study strategies, see CSC Exam Domains 2026: Complete Guide to All 4 Content Areas.
| Domain | Current Weight (through Nov 18, 2026) | Revised Weight (Nov 19, 2026 onward) |
|---|---|---|
| Procedures | 11% | 9% |
| Complications | 33% | 37% |
| Therapeutic Interventions | 43% | 43% |
| Monitoring and Diagnostics | 13% | 11% |
Eligibility Pathways
Before you can sit for CSC, you need an unencumbered U.S. RN or APRN license and a current, nationally accredited clinical nursing specialty certification. Beyond that, AACN offers two ways to qualify based on practice hours.
Two-Year Practice Route
- 1,750 hours caring for acutely or critically ill adults within the previous 2 years
- At least 875 of those hours completed in the most recent year
- 875 of the total hours must specifically involve adults during the first 48 hours after cardiac surgery
Five-Year Practice Route
- 2,000 qualifying adult acute/critical-care hours within the previous 5 years
- At least 144 of those hours completed in the most recent year
- 1,000 of the total hours must involve the first-48-hours postoperative cardiac-surgery population
Applicants must also identify a clinical supervisor or an RN/physician colleague who can verify their eligible practice hours if selected for an audit. Getting these hour breakdowns wrong - mixing general ICU hours with the specific postoperative cardiac-surgery hours required - is one of the most common application errors. For the full eligibility checklist and documentation tips, see CSC Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Keeping Your CSC Current: Renewal
CSC certification lasts 3 years. To renew, you need to maintain your qualifying license and your base certification, plus log 432 first-48-hours postoperative adult cardiac-surgery practice hours during the 3-year cycle, including 144 hours in the final year of the cycle.
From there, you choose one of two renewal paths:
- CERP path: Complete 25 relevant Category A Clinical Judgment CERPs. Fee: $75 for members, $130 for nonmembers.
- Exam path: Retake the renewal exam instead of accumulating CERPs. Fee: $125 for members, $170 for nonmembers.
Choosing between the two often comes down to how easily you can access relevant continuing education versus how comfortable you are re-testing. For a full cost comparison across initial certification and both renewal options, see CSC Certification Cost 2026: Complete Pricing Breakdown.
How to Approach Preparation
Given that Therapeutic Interventions and Complications make up 76% of the current exam, your review time should weight those two domains far more heavily than Procedures or Monitoring and Diagnostics. A reasonable approach: spend early weeks building depth in high-yield Therapeutic Interventions content (vasoactive titration, mechanical support, ventilatory management), then dedicate a comparable stretch to Complications recognition and response, and reserve shorter blocks for Procedures and Monitoring and Diagnostics review before shifting to full-length timed practice under the 2-hour, 90-question format.
Therapeutic Interventions Deep Dive
- Vasoactive/inotropic titration scenarios
- Mechanical circulatory support decision points
Complications Recognition
- Tamponade, bleeding, and arrhythmia case patterns
- Low cardiac output syndrome workups
Procedures & Monitoring/Diagnostics
- Surgical approach implications
- Hemodynamic waveform and lab-trend interpretation
Timed Practice Exams
- Full 90-question, 2-hour simulations
- Review misses against the correct domain blueprint
Whatever schedule you follow, run at least one full timed practice test that mirrors the real 2-hour, 90-question format before exam day - pacing under time pressure is a distinct skill from knowing the content. You can build that habit using timed sets on our CSC practice test platform. For a structured, week-by-week study plan built specifically around the current domain weights, see CSC Study Guide 2026: How to Pass on Your First Attempt, and if you want a realistic sense of how demanding the exam actually is before you commit to a timeline, read How Hard Is the CSC Exam? Complete Difficulty Guide 2026.
A condensed, one-page reference covering domain weights, hour requirements, and fee figures can also be useful in the final days before your exam - see CSC Cheat Sheet 2026: One-Page Review of Must-Know Facts. And if you're still deciding whether to pursue formal coursework alongside self-study, CSC Training covers what structured preparation options typically include. You can also start testing your baseline knowledge right now with practice questions on our CSC exam prep platform.
Frequently Asked Questions
CSC stands for Cardiac Surgery (Adult), a subspecialty certification from AACN Certification Corporation focused on nursing care during the first 48 hours after adult cardiac surgery.
The exam has 90 multiple-choice questions total: 75 scored and 15 unscored, administered within a 2-hour time limit.
Yes. CSC eligibility requires a current, nationally accredited clinical nursing specialty certification in addition to an unencumbered RN or APRN license.
CSC certification lasts 3 years, after which renewal requires either 25 relevant Category A Clinical Judgment CERPs or passing the renewal exam.
Therapeutic Interventions, weighted at 43% of the current exam, should get the most study time, followed closely by Complications at 33%.