Atrial fibrillation Atrial fibrillation
Conditions
Interventions
Dobutamine injection 5-20 microgram / kg / min intravenously for up to 10 minutes
Sponsors
Machino Tomoko
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: Inclusion criteria for the first step 1)Patients with valvular or non-valvular atrial fibrillation (AF) 2)Patients undergoing transesophageal echocardiography (TEE) for evaluation of intracardiac thrombus before catheter ablation for AF, percutaneous left atrial appendage (LAA) occlusion, percutaneous mitral valve commissurotomy, and electrical cardioversion, or patients suspected cardiogenic stroke and undergoing TEE to evaluate intracardiac thrombus 3)Patients with a CHADS2 score of 1 or higher 4)Patients receiving anticoagulant therapy 5)Men and women over 20 years old 6)Patients with written informed consent Inclusion criteria for the second step 7)Patients with severe blood flow stasis (spontaneous echo contrast grade of 3 or 4) in left atrium (LA) and LAA
Exclusion criteria
Exclusion criteria: Exclusion criteria for the first step 1) Patients with past history of LAA occlusion or resection 2) Patients with systolic blood pressure of 80 mmHg or less or 180 mmHg or more before the start of TEE 3) Patients with heart rate (measured by the average method) of 100 bpm or more before the start of TEE 4) Patients receiving catecholamines 5) Patients with a history of allergic reactions to dobutamine 6) Patients with hypertrophic cardiomyopathy who have intraventricular obstruction with a maximum pressure gradient of 30 mmHg or more 7) Patients with unstable angina 8) Patients with disorientation, quadriplegia, dysarthria, and visual field impairment 9) Women who are pregnant or may become pregnant 10) Patients who are judged inappropriate by the researcher Exclusion criteria for the second step 11) Patients with obvious LAA thrombus without infusion of dobutamine 12) Patients with systolic blood pressure of 80 mmHg or less or 180 mmHg or more before the start of dobutamine infusion 13) Patients with heart rate (measured by the average method) of 100 bpm or more before the start of dobutamine infusion
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Changes in the grade of spontaneous echo contrast in LA and LAA before and after dobutamine infusion evaluated by the doctor performed TEE | — |
Secondary
| Measure | Time frame |
|---|---|
| Changes in the grade of spontaneous echo contrast in LA and LAA before and after isoprenaline infusion evaluated by other independent investigator Changes in the LAA blood flow velocity, LAA wall motion velocity, LAA emptying fraction, left ventricular ejection fraction before and after isoprenaline infusion Number of cases for which the presence or absence of LAA thrombus could be diagnosed after isoprenaline infusion, and prevalence of LAA thrombus | — |
Contacts
Public ContactTomoko Machino
University of Tsukuba
Outcome results
None listed