How to Submit to Circulation: Process & Requirements 2026

• Submission intake and editorial screen: Submitted manuscripts are examined by the editorial staff and editors, and a decision is made whether to refer the manuscript for external peer review. Manuscripts that are not likely to receive a priority sufficient for publication are returned after initial screening without external review.
• AHA family routing: The AHA says manuscripts may be referred to another AHA journal, such as Circulation Research, Circulation: Heart Failure, or Circulation: Arrhythmia and Electrophysiology, before or after peer review, and that the downstream journal's editors have already done a preliminary assessment.
• External peer review and statistical review: Manuscripts sent for review that receive an initial favorable response undergo independent statistical review, when appropriate. The AHA does not publish how many reviewers it recruits or how long recruitment takes.
• First decision: The AHA reports 17 days from submission to first decision for Original Research Articles. It does not publish separate durations for screening, review, and editorial decision.
• Revision: Original Research Articles and Research Letters have a 90-day revision time dated from the most recent decision letter. Major-revision decisions specify the evidence gaps that must close before resubmission.

Run a Circulation pre-submission readiness check before clicking submit, or work through this guide manually.

Impact factor from Clarivate Journal Citation Reports (2026 release); acceptance rate, first-decision time, publication frequency and APC from the AHA's Circulation About and Open Access Information pages.

• Original Research Articles: 4,000 words max, structured abstract (up to 300 words), up to 50 references, up to 6 figures and tables combined (the AHA publishes no limit on supplemental material, which is permitted only for Original Research Articles and State-of-the-Art submissions).

• Research Letters: 800 words, 1 figure or table, 5 references, no abstract.

• Requested or required: a Clinical Perspective for Original Research manuscripts (requested), conflict-of-interest disclosures through Convey at revision, an authorship attestation that identifies each author's contribution before publication, and a Data Availability Statement for original research articles. Clinical trial reports should follow CONSORT with a flow diagram, and trials must be registered in a public registry at or before the onset of enrollment.

Publisher-reported acceptance figures link to their source. Elsevier catalog figures were checked on October 21, 2026; the catalog does not specify the reporting period or submission denominator. “Not verified” means we have not confirmed a current figure.

Circulation and European Heart Journal are the two dominant cardiology journals globally. The choice often comes down to geography (US vs European author networks), but editorial standards are comparable. Basic cardiovascular science without a clinical bridge belongs at Circulation Research, not Circulation.

The Clinical Perspective is requested for Original Research manuscripts and sits right after the abstract. It has two sections ("What Is New?" and "What Are the Clinical Implications?") each with 2-3 bullet points of up to 100 words. A weak Clinical Perspective can sink a paper that's otherwise strong.

"What Is New" needs specific findings with effect sizes. Not "we show that treatment X improves outcomes" but "in 1,240 patients, treatment X reduced the composite endpoint by 22% over 24 months." Include numbers, editors scanning dozens of submissions need to see the magnitude in 10 seconds.

"What Are the Clinical Implications" must connect directly to what a cardiologist does in practice. Not "supports further research" but "patients with Y who are currently receiving standard of care X should be considered for treatment Z."

Write this section last. If you can't fill in specific findings with effect sizes and specific practice changes, the paper may not be ready for Circulation.

Before submitting to Circulation, a Circulation manuscript fit check identifies whether the package meets the editorial bar before you commit to the submission.

Circulation returns many submissions after initial screening without external review. The patterns:

1. Incremental clinical findings. "We confirmed that drug X works in population Y" gets desk-rejected unless the population or outcome is genuinely new.

1. Single-center observational studies with small samples. Circulation expects multi-center data or population-level cohorts. Under 500 patients is a red flag for observational work.

1. Animal studies without translational clarity. Basic science papers need to explain the path to human application within the first paragraph.

1. Missing registration for clinical trials. Any interventional study must be registered on ClinicalTrials.gov or equivalent. Missing registration = automatic rejection.

1. Weak statistical methods. Propensity scores without sensitivity analysis, underpowered studies presented as definitive, multiple comparisons without correction.

1. Weak Clinical Perspective. Many desk rejections happen because this section is vague even when the paper itself is solid. Bullets that describe methods instead of findings, implications that are too generic, and missing effect sizes all signal "not ready."

Circulation editors read the cover letter first. Keep it under 300 words with this structure:

• Sentence 1-2: What you studied and found. Be specific (include primary endpoint result and HR/p-value).

• Sentence 3-4: Clinical significance. Which patients benefit? What changes in practice?

• Sentence 5-6: Why Circulation specifically? Scope and readership fit.

Don't waste space explaining why cardiovascular disease matters. The editors know.

The Clinical Perspective (separate from the cover letter) also needs serious attention. It sits right after the abstract, so editors can read it alongside the abstract. It's your short case for why this paper is novel and why it matters. The "What Is New" part should contain 2-3 bullet points, each stating a single finding with specifics and numbers. The "What Are the Clinical Implications" part should have 2-3 bullet points connecting findings directly to practice changes. Each part is limited to 100 words.

Avoid bullets that describe methods instead of findings, and don't write implications that amount to "further research is needed."

Circulation sends manuscripts that clear initial screening for external peer review, and manuscripts that receive an initial favorable response undergo independent statistical review when appropriate. The AHA's author instructions do not state the number of reviewers, whether review is blinded, or the review period.

Possible decisions: accept, minor revision, major revision, reject, or referral to another AHA journal before or after peer review. The AHA does not publish how often each decision is made.

Major revisions typically ask for additional subgroup analyses, sensitivity analyses with different covariate adjustments, clarification of whether endpoints were pre-specified or exploratory, and updated literature review addressing recent publications. The revision window is 90 days for Original Research Articles and Research Letters, dated from the most recent decision letter; a revision not received within the specified time may be considered withdrawn, and a later resubmission is handled as a new submission with a new manuscript number.

Circulation has strict statistical standards, especially for clinical trials:

• Multiple comparisons: If you tested multiple secondary endpoints, address multiplicity explicitly. Pre-specified primary endpoints can stand alone; exploratory analyses need correction or disclosure as exploratory.

• P-values vs. confidence intervals: Circulation increasingly prefers effect sizes with confidence intervals over just p-values. Report both.

• Missing data: Imputation strategy must be stated. Complete case analysis without justification is flagged routinely.

• Kaplan-Meier figures: For time-to-event data, show numbers at risk at each time interval; the AHA's statistical recommendations cover survival analyses in their own section.

Circulation's editorial direction reflects where cardiology is headed. Aligning your manuscript isn't gaming the system, it's matching your work to where the journal's attention actually is.

The AHA's mission shapes editorial decisions. Studies in diverse populations get genuine attention, if your trial includes meaningful representation from historically underrepresented groups, make that explicit. Guideline relevance matters: if your findings could change an AHA/ACC recommendation, say which class of recommendation and which population. Industry-funded trials receive extra scrutiny on pre-specified endpoints and transparent sensitivity analyses.

After submission, a handling editor reads your abstract, the first two paragraphs of your introduction, and your figures. They're asking five things: Is this within Circulation's scope (clinical cardiovascular)? Does the primary endpoint answer a clinical question that matters? Is the study design sound (randomized, adequately powered, appropriate controls)? Does the abstract clearly state what was done, found, and what it means? Is this clinically significant enough for Circulation's readership?

Circulation editors are generally cardiologists or cardiovascular scientists. They know the clinical field cold. If your work doesn't move the needle for clinical practice, they'll tell you quickly; the AHA reports 17 days from submission to first decision for Original Research Articles.

AHA-specific formatting: Circulation will consider an initial Original Research submission that is not formatted to journal style, but it must meet the AHA's format-free Minimum Submission Requirements (all files needed for review, the manuscript assembled in the AHA's order, and numbered citations) or it may be returned. Revised and accepted manuscripts must follow the journal's formatting requirements. Disclose all funding sources exhaustively: the AHA asks for all sources of research support, including public and private entities and commercial or institutional support.

For manuscripts targeting Circulation, five patterns generate the most consistent desk rejections worth knowing before submission. Each one is something an editor can see from the abstract, Clinical Perspective box, and cover letter alone, which is why they trigger fast desk decisions rather than reviewer comments. In our pre-submission review work, these are the patterns that most often separate a paper that reaches review from one returned within the first week.

Clinical evidence package too narrow for the practice-change claim being made

The Circulation author instructions describe research aimed at improving the health of people at risk for, or living with, cardiovascular disease, and ask Original Research authors for a Clinical Perspective that summarizes the key observations and their clinical relevance. In our reading, a strong one states what is new and what changes for cardiologists, with specific effect sizes.

In our pre-submission review work, we see many desk rejections involve manuscripts where the abstract signals a practice-changing finding but the evidence rests on a single-center cohort, an underpowered subgroup analysis, or outcomes that do not directly answer a clinical decision. Editors specifically screen for manuscripts where the Clinical Perspective box writes itself from the data, not from author aspiration.

Check clinical evidence package too narrow for the practice change claim being made before submitting to How to Submit to Circulation: Process & Requirements 2026 →

Single-center observational study without methodological compensation for the breadth of the claim

We also often find many submissions are single-center retrospective or observational analyses that present conclusions as generalizable across cardiology practice without sensitivity analyses, external validation cohorts, or other design features that address the geographic and population constraints of single-institution data. In practice, editors consistently reject manuscripts where the dataset is from one institution and the study size is below 500 patients, because Circulation expects either multi-center data or a population-level cohort for claims of broad clinical significance.

Check single center observational study without methodological compensation for the br before submitting to How to Submit to Circulation: Process & Requirements 2026 →

Clinical Perspective describes methods rather than findings at time of submission

A related pattern is that many submissions arrive with a Clinical Perspective where the bullets summarize what the study did rather than what it found and what it means for practice. Editors consistently screen for a Clinical Perspective where each bullet states a specific finding with an effect size and connects directly to a clinical decision, because our analysis of desk rejections at Circulation shows that a methods-summary statement signals the paper may not have a result strong enough to carry a flagship submission.

• Basic cardiovascular science submitted without a convincing translational bridge to clinical practice. A related pattern is that many submissions present mechanistic or animal-model findings as the primary contribution without explaining how and when the mechanism connects to human cardiovascular disease management within the current submission. In our analysis of desk rejections at Circulation, this pattern is most common in manuscripts that belong at Circulation Research, where the editorial standard centers on mechanistic depth rather than immediate clinical consequence.

• Cover letter does not state the primary finding with a specific clinical impact for cardiologists. A related pattern is that many submissions arrive with cover letters that describe the research topic and study design without stating the primary endpoint result and what a cardiologist should do differently because of it. Editors explicitly consider whether the cover letter provides a clear clinical impact statement before routing the paper for specialist review.

Before submitting to Circulation, a Circulation submission readiness check identifies whether your clinical evidence package, Clinical Perspective, and practice-change case meet the editorial bar before you commit to the submission.

Check novelty and significance statement describes methods rather than findings at tim before submitting to How to Submit to Circulation: Process & Requirements 2026 →