- Overview of the Six ACS-CARDIAC Domains
- Domain 1: Assimilating History, Clinical, and Echocardiographic Findings
- Domain 2: Assessing Cardiovascular Heart Disease
- Domain 3: Assessing Valvular Heart Disease
- Domain 4: Evaluating Structural Heart and Interventional Procedures
- Domain 5: Utilizing Advanced and Multi-Modality Imaging
- Domain 6: Assessing Congenital Heart Disease
- How the Domains Show Up in the 170-Question Exam
- Scheduling Your Study Time Around Domain Weight
- Frequently Asked Questions
- Domain 2, Assessing Cardiovascular Heart Disease, carries 39% of the exam - nearly two-fifths of your score.
- Domains 2-4 together account for 74% of the exam; congenital heart disease is only 5%.
- The exam has 170 questions (150 scored, 20 unscored) across four item formats, including hotspot and drag-and-place.
- Passing requires a scaled score of 650 out of 900, not a fixed percentage of correct answers.
Overview of the Six ACS-CARDIAC Domains
Cardiovascular Credentialing International (CCI) organizes the Advanced Cardiac Sonographer examination around a six-domain content matrix. Each domain represents an approximate share of your scored questions, and understanding those weights is the single most efficient way to plan your preparation. If you have not yet reviewed how the credential is scored, the ACS-CARDIAC Passing Score breakdown explains how the 650-of-900 scaled score interacts with domain performance.
Unlike entry-level sonography credentials that spread emphasis evenly, the ACS-CARDIAC matrix is heavily skewed toward acquired heart disease. Three domains - Assessing Cardiovascular Heart Disease, Assessing Valvular Heart Disease, and Evaluating Structural Heart and Interventional Procedures - together make up 74% of the exam. The remaining three domains fill out the rest with smaller, more targeted slices.
| Domain | Approximate Exam Weight | Core Focus |
|---|---|---|
| 1. Assimilating History, Clinical, and Echocardiographic Findings | 10% | Integrating patient data with imaging |
| 2. Assessing Cardiovascular Heart Disease | 39% | Ischemic disease, cardiomyopathies, function |
| 3. Assessing Valvular Heart Disease | 18% | Stenosis, regurgitation, prosthetic valves |
| 4. Evaluating Structural Heart and Interventional Procedures | 17% | TAVR, TEER, device evaluation |
| 5. Utilizing Advanced and Multi-Modality Imaging | 11% | 3D, strain, contrast, correlating modalities |
| 6. Assessing Congenital Heart Disease | 5% | Adult congenital recognition |
Domain 1: Assimilating History, Clinical, and Echocardiographic Findings (10%)
This domain tests your ability to synthesize a patient's referral information, clinical presentation, and prior imaging with what you observe during the current study. Roughly one in ten scored questions will ask you to reconcile these pieces rather than identify an isolated image finding in isolation.
Assimilating History, Clinical, and Echocardiographic Findings
Candidates must connect symptoms, lab values, and prior reports to the echocardiographic exam at hand.
- Recognizing when clinical history should prompt additional views or modalities
- Correlating symptoms (dyspnea, syncope, chest pain) with likely echo findings
- Identifying discrepancies between reported history and imaging results
Because this domain is comparatively small, it is a strong candidate for early review rather than a dedicated final push. Many candidates fold it into their broader review using the ACS-CARDIAC Study Guide, which sequences content-area review around domain weight.
Domain 2: Assessing Cardiovascular Heart Disease (39%)
This is by far the largest domain and deserves the largest share of your preparation time. At 39% of the exam, it functions almost as a second exam within the exam - mastery here has an outsized effect on whether you clear the 650 passing threshold.
Assessing Cardiovascular Heart Disease
Covers systolic and diastolic function, ischemic heart disease, and the cardiomyopathies in depth.
- Left and right ventricular systolic function quantification methods
- Diastolic function grading and its clinical implications
- Ischemic heart disease: regional wall motion abnormalities and their coronary correlates
- Hypertrophic, dilated, and restrictive cardiomyopathy differentiation
- Pericardial disease, including tamponade and constrictive physiology
Key Takeaway
Because Domain 2 alone approaches 40% of the scored exam, weak recall in this area is the most common reason candidates fall short of 650. Prioritize it above every other domain.
If you are trying to gauge your overall readiness before committing to a testing window, the How Hard Is the ACS-CARDIAC Exam guide discusses how domain-level weakness typically shows up in self-assessment results.
Domain 3: Assessing Valvular Heart Disease (18%)
Valvular disease is the second-largest domain, and it tests both native and prosthetic valve evaluation. Expect questions that require you to grade severity using multiple parameters rather than a single measurement.
Assessing Valvular Heart Disease
Requires fluency in stenosis and regurgitation grading criteria for all four valves.
- Aortic and mitral stenosis severity grading using multiple Doppler parameters
- Regurgitant lesion quantification: vena contracta, PISA, and volumetric methods
- Prosthetic valve evaluation and recognizing dysfunction or paravalvular leak
- Infective endocarditis findings and complications
Valvular questions often present combined scenarios - for example, a patient with both stenosis and regurgitation - so isolated flashcard review of single lesions is not sufficient preparation.
Domain 4: Evaluating Structural Heart and Interventional Procedures (17%)
This domain reflects how much cardiac imaging has shifted toward procedural support. At 17%, it is nearly as heavily weighted as valvular disease, and it is the domain most likely to feel unfamiliar to candidates who trained primarily in diagnostic echocardiography rather than structural heart programs.
Evaluating Structural Heart and Interventional Procedures
Covers pre-procedural assessment, intra-procedural guidance, and post-procedural evaluation.
- Transcatheter aortic valve replacement (TAVR) candidacy assessment and post-procedure imaging
- Transcatheter edge-to-edge repair (TEER) and other mitral interventions
- Left atrial appendage occlusion device evaluation
- Septal defect closure device assessment and complication recognition
Domain 5: Utilizing Advanced and Multi-Modality Imaging (11%)
This domain tests your ability to move beyond standard 2D transthoracic imaging and integrate other modalities into your interpretation.
Utilizing Advanced and Multi-Modality Imaging
Focuses on when and why a sonographer should recommend or correlate additional imaging.
- 3D echocardiographic reconstruction and its added value over 2D
- Strain imaging and speckle-tracking interpretation
- Contrast echocardiography indications and artifact recognition
- Correlating echo findings with CT, MRI, and nuclear imaging when relevant
Because this material overlaps with structural and interventional content, many candidates review Domains 4 and 5 back to back rather than as isolated units.
Domain 6: Assessing Congenital Heart Disease (5%)
The smallest domain focuses on adult congenital heart disease recognition rather than pediatric management, which fits the adult-focused scope of the credential.
Assessing Congenital Heart Disease
Emphasizes pattern recognition of common adult congenital lesions.
- Atrial and ventricular septal defects: recognition and shunt physiology
- Patent foramen ovale versus atrial septal defect differentiation
- Bicuspid aortic valve and associated aortopathy
- Repaired congenital lesions presenting in adulthood
At only 5% of the exam, this domain warrants a proportionally light review - enough to recognize classic presentations, without the deep repetition you'd apply to Domain 2.
How the Domains Show Up in the 170-Question Exam
The ACS-CARDIAC exam consists of 170 total questions: 150 scored and 20 unscored, delivered by computer at Pearson VUE or Pearson Professional Center locations. Because unscored items are indistinguishable from scored ones, every question deserves full attention regardless of how confident or unfamiliar it feels.
You'll have 2 hours and 50 minutes of answering time inside a three-hour appointment, with the remaining 10 minutes allocated to the tutorial and post-exam survey. Question formats include single-answer multiple choice, multiple response, hotspot, and drag-and-place - so Domain 2 and Domain 3 content, in particular, may appear as image-based hotspot items requiring you to identify a structure or measurement location rather than simply select text.
Key Takeaway
Passing requires a scaled score of 650 on a 0-900 scale, not a fixed percentage correct - CCI weights items differently, so don't try to reverse-engineer a "percent needed" target.
The test center supplies an on-screen calculator and an erasable note board; personal books and notes are not permitted unless specifically authorized in advance. For a full walkthrough of appointment logistics and testing windows, see ACS-CARDIAC Exam Dates, since ACS testing only occurs in February and August each year.
Scheduling Your Study Time Around Domain Weight
Generic study techniques - spaced repetition, timed question blocks, weekly review cycles - only pay off when they're mapped to the actual domain weights above. A candidate who spends equal time on Domain 6 (5%) and Domain 2 (39%) is misallocating hours that could move their scaled score.
Domain 2 Foundations
- Ventricular function quantification and grading systems
- Ischemic wall motion patterns and cardiomyopathy differentiation
Domain 3 and Domain 4
- Valve severity grading across all four valves
- Structural and interventional device evaluation
Domain 1 and Domain 5
- Clinical correlation scenarios
- 3D, strain, and multi-modality correlation
Domain 6 and Full Review
- Adult congenital pattern recognition
- Mixed practice questions across all six domains
Before your final review week, consider the official optional self-assessment, which costs $55 and reports performance by content area, though it does not include question-by-question answer review. It's a useful diagnostic for confirming whether your Domain 2 and Domain 3 preparation is actually solid before you commit to a February or August testing window.
For a condensed reference you can review the night before your appointment, the ACS-CARDIAC Cheat Sheet consolidates the highest-yield facts from all six domains onto a single page. And if you're still confirming eligibility before you start studying domain content at all, check the ACS-CARDIAC Requirements article to make sure you qualify under one of CCI's four routes.
You can also start building domain familiarity right now using realistic practice questions on our ACS-CARDIAC practice test platform, which mirrors the multiple-choice, multiple-response, hotspot, and drag-and-place formats you'll encounter on test day.
Frequently Asked Questions
Most candidates start with Domain 2, Assessing Cardiovascular Heart Disease, because it represents 39% of the exam and touches foundational concepts used throughout the other domains.
No. CCI's matrix assigns approximate percentage weights per domain, ranging from 5% for Assessing Congenital Heart Disease up to 39% for Assessing Cardiovascular Heart Disease, so question counts vary significantly by domain.
No. The exam includes 170 total questions, 150 scored and 20 unscored, and candidates cannot tell which is which, so every item should be treated as scored.
Yes. The optional $55 self-assessment reports performance by content area, though it does not provide a question-by-question answer review, so it's best used as a directional guide rather than an answer key.
See What Is ACS-CARDIAC? and ACS-CARDIAC Certification for background on the credential, or ACS-CARDIAC Jobs for how domain expertise translates into hiring qualifications.