- What CSC Certification Actually Is
- Who Grants CSC and What the Credential Signals
- Exam Format and Scoring
- The Four CSC Exam Domains
- Eligibility Routes and Practice Hours
- Registration and Fees
- Certification Period and Renewal
- Who Hires CSC-Certified Nurses
- How to Approach Preparation
- Frequently Asked Questions
- CSC is AACN Certification Corporation's subspecialty credential for nurses caring for adults in the first 48 hours after cardiac surgery.
- The exam has 90 multiple-choice questions (75 scored, 15 unscored) in a 2-hour, closed-book format.
- Passing requires 55 of 75 scored questions correct under the current test plan.
- Therapeutic Interventions and Complications together make up 76% of the current exam blueprint.
What CSC Certification Actually Is
CSC stands for Cardiac Surgery (Adult), a specialty nursing certification administered by AACN Certification Corporation, the credentialing arm of the American Association of Critical-Care Nurses. It is not a general critical-care credential. CSC exists specifically to validate the knowledge and clinical judgment needed to care for adult patients during the first 48 hours after cardiac surgery - arguably the most physiologically volatile window in the entire postoperative course.
That narrow focus is what distinguishes CSC from broader ICU or progressive-care certifications. A nurse holding CSC has demonstrated mastery of the hemodynamic shifts, bleeding risks, arrhythmias, and rapid interventions that define early post-cardiac-surgery recovery, whether the patient is recovering from CABG, valve repair, or another major cardiac procedure.
If you're still sorting out the basics of the acronym itself, our companion pieces on What Is CSC?, CSC Meaning, and What Does CSC Stand For? cover that ground in more depth.
Who Grants CSC and What the Credential Signals
AACN Certification Corporation issues CSC alongside its other acute and critical-care specialty certifications. Earning it tells employers and colleagues that a nurse can be trusted with the highest-acuity, highest-stakes hours after cardiac surgery - a period when subtle changes in a patient's rhythm, filling pressures, or chest tube output can signal an emergency.
Because CSC is a subspecialty certification, it is layered on top of an existing base certification rather than replacing it. That structural detail matters for eligibility, and it's one of the most misunderstood parts of the credential - covered fully in CSC Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Exam Format and Scoring
The CSC exam is a closed-book, computer-based test delivered at PSI test centers or via Live Remote Proctoring. Candidates answer 90 multiple-choice questions in 2 hours, though only 75 of those questions are scored - the remaining 15 are unscored items used for future exam development, and test-takers cannot tell which is which.
Under the current test plan, the passing cut score is 55 out of 75 scored questions. That threshold and the domain weighting below apply to the January 31, 2022 exam version, which remains in effect through November 18, 2026.
Key Takeaway
Know which exam version you're sitting for before you build a study plan. The domain weights change for exams administered on or after November 19, 2026, so practice materials and blueprints must match your actual test date - see CSC Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
The Four CSC Exam Domains
CSC content is organized into four domains that reflect the real clinical workflow of early postoperative cardiac care: recognizing complications, monitoring the patient, intervening therapeutically, and managing procedures and devices. Here is the current weighting:
Domain 1: Procedures (11%)
Covers the surgical and device-related knowledge nurses need in the immediate postoperative period.
- Chest tube management and mediastinal drainage
- Temporary pacing wires and epicardial pacing
- Intra-aortic balloon pump and mechanical circulatory support basics
Domain 2: Complications (33%)
Focuses on recognizing and responding to the adverse events most common after cardiac surgery.
- Bleeding, tamponade, and coagulopathy
- Postoperative arrhythmias, including atrial fibrillation
- Low cardiac output states and vasoplegia
Domain 3: Therapeutic Interventions (43%)
The largest domain by far, testing the actions a nurse takes to stabilize and advance the patient's recovery.
- Vasoactive and inotropic medication titration
- Fluid, electrolyte, and glycemic management
- Ventilator weaning and extubation readiness
Domain 4: Monitoring and Diagnostics (13%)
Covers interpretation of the data streams nurses rely on to detect problems early.
- Hemodynamic waveform and pressure interpretation
- 12-lead ECG and telemetry changes
- Lab trends relevant to bleeding, renal function, and perfusion
Notice that Therapeutic Interventions and Complications together account for 76% of the current exam - meaning roughly three out of every four scored questions touch one of these two domains. A candidate who under-prepares either one is taking on significant risk. For a deeper breakdown of every subtopic within each domain, 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 Routes and Practice Hours
CSC eligibility requires an unencumbered U.S. RN or APRN license plus a current, nationally accredited clinical nursing specialty certification already in hand - CSC is layered on top of that base credential, not a replacement for it. Beyond licensure, candidates must meet one of two clinical practice hour routes:
Two-Year 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 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 their application is audited. Because these hour thresholds are specific and unforgiving, it's worth reviewing them carefully before you register - CSC Requirements 2026: Eligibility, Prerequisites & How to Qualify walks through documentation and common eligibility mistakes in detail.
Registration and Fees
The initial CSC exam fee is $150 for AACN members and $240 for nonmembers. Testing happens at PSI test centers or through Live Remote Proctoring, so candidates can often choose the format that best fits their schedule and comfort with remote proctoring software.
A full pricing picture - including renewal costs - helps with budgeting well ahead of exam day. See CSC Certification Cost 2026: Complete Pricing Breakdown for the complete fee structure.
Certification Period and Renewal
CSC certification is valid for 3 years. To renew, a nurse must maintain the qualifying license and base certification, log 432 first-48-hours postoperative adult cardiac-surgery practice hours during the 3-year cycle (including 144 hours in the most recent year), and complete one of two paths:
- Continuing education path: 25 relevant Category A Clinical Judgment CERPs, renewal fee of $75 (member) or $130 (nonmember)
- Renewal exam path: Retake and pass the renewal exam, fee of $125 (member) or $170 (nonmember)
Most nurses choose the CERP route because it avoids sitting for another closed-book exam, but both paths keep the credential active and demonstrate continued competency in the specialty.
Who Hires CSC-Certified Nurses
CSC-certified nurses typically work in cardiac surgical ICUs, cardiovascular intensive care units, and dedicated post-cardiotomy recovery units at hospitals that perform open-heart procedures - including CABG, valve repair or replacement, and other major cardiac surgeries. Because the certification validates a very specific clinical population, hospitals with active cardiac surgery programs often view CSC as a strong differentiator when evaluating experienced ICU nurses for these units.
The credential can also support career moves into charge nurse, preceptor, or clinical educator roles within cardiac surgical services, since it signals depth in a high-acuity specialty that many general ICU nurses haven't formally validated. If you're weighing whether the investment of time and money pays off for your career trajectory, Is the CSC Certification Worth It? Complete ROI Analysis 2026 and CSC Salary Guide 2026: Complete Earnings Analysis dig into that question directly. For nurses actively browsing openings, CSC Jobs is a useful starting point.
How to Approach Preparation
Because Therapeutic Interventions (43%) and Complications (33%) dominate the exam, an efficient study sequence front-loads those two domains before spending proportionally less time on Monitoring and Diagnostics (13%) and Procedures (11%). A simple way to structure this without over-engineering your schedule:
Therapeutic Interventions
- Vasoactive drip titration logic and hemodynamic goals
- Ventilator weaning criteria and extubation readiness
- Fluid, electrolyte, and glycemic protocols in the postoperative window
Complications
- Bleeding, tamponade, and coagulopathy recognition
- Arrhythmia identification and immediate response
- Low cardiac output and vasoplegia differentiation
Monitoring and Diagnostics
- Hemodynamic waveform interpretation
- 12-lead ECG changes specific to postoperative patients
- Lab trend analysis for perfusion and renal status
Procedures and Full Review
- Chest tube and pacing wire management
- Mechanical circulatory support basics
- Timed practice questions across all four domains
This weighting-first approach avoids the common mistake of spreading study time evenly across four domains that are not weighted evenly. For a more detailed week-by-week plan and question-bank strategy, see CSC Study Guide 2026: How to Pass on Your First Attempt. If you're trying to gauge realistic difficulty before committing to a study timeline, How Hard Is the CSC Exam? Complete Difficulty Guide 2026 and CSC Pass Rate 2026: What the Data Shows are worth reading first, and a quick reference like CSC Cheat Sheet 2026: One-Page Review of Must-Know Facts can help during final review. You can also work through timed, domain-weighted practice questions on our CSC practice test platform to see how your preparation holds up under exam conditions.
Frequently Asked Questions
CSC stands for Cardiac Surgery (Adult), an AACN Certification Corporation credential for nurses caring for adult patients during the first 48 hours after cardiac surgery. See What Does CSC Mean? for more on the terminology.
CSC is a subspecialty certification. Eligibility requires already holding a current, nationally accredited clinical nursing specialty certification along with an unencumbered RN or APRN license.
CSC certification is valid for 3 years. Renewal requires ongoing practice hours in the specialty plus either Category A Clinical Judgment CERPs or a renewal exam.
Under the current test plan, candidates must answer 55 of 75 scored questions correctly out of the 90 total questions presented (75 scored, 15 unscored).
The CSC exam is offered at PSI test centers or through Live Remote Proctoring, giving candidates flexibility in how and where they sit for the closed-book test.
Understanding exactly what CSC certification measures - and how its domain weighting maps to real postoperative cardiac care - is the foundation for any serious preparation plan. From here, the practical next steps are confirming your eligibility route, locking in your exam date, and building a domain-weighted study schedule around Therapeutic Interventions and Complications.