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Arrhythmias, Cardiac clinical trials

The registry lists 1,051 studies for Arrhythmias, Cardiac across more than 10 countries. 236 are recruiting or about to start. 409 of them are mainly about Arrhythmias, Cardiac (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-12. Counting its 16 narrower conditions too, such as Atrial Fibrillation: 5,976 studies, 1,391 open.

ClinicalTrials.gov finds 5,982 studies for Arrhythmias, Cardiac. How that becomes 1,050 here

This page counts the studies the registry files under Arrhythmias, Cardiac, and those it files under no condition that list Arrhythmias, Cardiacthemselves. Each study its search finds is placed by how the registry filed it and by the conditions it lists. ClinicalTrials.gov counts as of Nov 8, 2026. How condition pages count

  1. 5,982Found by its condition searchIt reads the conditions a study lists and their synonyms, and also titles and keywords.
  2. −4,684Filed under a narrower condition, counted on its own pageAtrial Fibrillation 3,526 · Tachycardia, Ventricular 336 · Bradycardia 223 · Tachycardia 93 · Long QT Syndrome 86 · Bundle-Branch Block 77 · 10 more
  3. −115List Arrhythmias, Cardiac as a condition, but the registry did not file them under itMost often written as “Ventricular Arrythmia” (33), “Ventricular Arrhythmias” (15), and “Ventricular Arrhythmia” (12). The registry filed 40 of them under no condition at all, and the others under other conditions only, most often Heart Failure (19) and Death, Sudden, Cardiac (16).
  4. −133Match it another way71 name it in the title, 32 in a keyword, and 30 by a synonym or other text the search reads.
  5. 1,050The count on this page

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Status

Completed
541
Recruiting
167
Status unknown
147
Not yet recruiting
57
Terminated
50
Active, not recruiting
43

Phase

Phase 4
68
Phase 3
51
Phase 2
45
Phase 1
18
Early Phase 1
3

Where

United States
337
Germany
94
Italy
86
France
85
Canada
73
Netherlands
72

Who runs them

Abbott Medical Devices (34) · National Heart, Lung, and Blood Institute (NHLBI) (27) · Medtronic Cardiac Rhythm and Heart Failure (24) · Boston Scientific Corporation (14) · University of California, San Diego (12) · Biosense Webster, Inc. (11) · Mayo Clinic (11) · Assiut University (10)

What is being tested here

Drugs under test in Arrhythmias, Cardiac studies, those with the most open studies first. Medicines only given beside them are not counted. How drugs are counted

DrugOpenPhase 3All
Atorvastatin116
Colchicine133
Propofol102
Carvedilol102
Anisodamine101
Relaxin101
Deferoxamine101
Deferasirox101
Deferiprone101
CRD-4730101

Drug classes tested here Beta blockers 1 open · Factor Xa inhibitors 5 · Calcium channel blockers 5 · Local anesthetics 4 · Bronchodilators 3

Coming up

1phase 3 study under way
72studies finish main data collection within a year1 of them phase 3

Studies recruiting or running, from their records. “Main data collection” ends at the primary completion date, the sponsor’s own estimate, which often moves.

The 10 nearest, phase 3 first

Who these studies take

Of the 167 Arrhythmias, Cardiac studies recruiting now, 118 (71%) set no upper age limit and 13 (8%) stop at 75 or younger. 31 (19%) take children under 18. 1 (1%) are for women only and 0 (0%) for men only; 26 (16%) take healthy volunteers.

Recruiting studies that take each age, of 167
AgeWomenMen
1028 (17%)28 (17%)
18147 (88%)147 (88%)
30153 (92%)153 (92%)
40154 (92%)154 (92%)
50155 (93%)155 (93%)
65159 (95%)158 (95%)
75158 (95%)157 (94%)
85141 (84%)140 (84%)

Across all 1,051 studies, recruiting or not: 14% stop at 75 or younger and 8% at 65; 16% take children; 1% are for women only and 2% for men only; 15% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Arrhythmias, Cardiac studies take

Of 24 phase 4 interventional studies under Arrhythmias, Cardiac, half reached primary completion within 27 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Phase 427 mo11–57 · 24 studies——
Interventional, no phase24 mo12–40 · 242 studies15 mo6–28 · 71 studies30 mo14–43 · 171 studies
Observational38 mo16–97 · 258 studies24 mo11–51 · 69 studies45 mo22–140 · 189 studies

Each figure is the month by which half the studies had reached primary completion, with the range in which the middle half did. Studies still running count until their last registry update; studies that stopped early are left out. Phase 1 includes early phase 1; observational means prospective or not stated, as retrospective and cross-sectional studies date a window of data rather than a study. How these figures are worked out

What changed recently

From the registry's own updates since Oct 14, 2026.

Started recruiting2

Results posted1

Newly registered4

Studies

Recruiting first, then most recently updated. Showing 50 of 1,051. Browse all 1,051 → or search them.