| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Left atrial-appendage thrombus in atrial fibrillation |  
| Thrombus im linken Herzohr bei Patienten mit Vorhofflimmern |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| thrombus in atrial fibrillation |  
| Thrombus bei Patienten mit Vorhofflimmern |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Cardiovascular Diseases [C14] | 
| MedDRA Classification | 
| E.1.3 | Condition being studied is a rare disease | No | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| To assess whether Dabigatran leads to a faster complete LAA thrombus resolution as compared to Phenprocoumon. |  | 
| E.2.2 | Secondary objectives of the trial | 
| To assess the impact of Dabigatran on - complete LAA thrombus resolution rate until week 6
 - change in LAA thrombus size under treatment
 
 To assess and compare safety and tolerability of Dabigatran and Phenprocoumon
 
 |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| - Patients with documented non-valvular AF or atrial flutter (12-lead ECG) - Newly diagnosed or confirmed LAA thrombus in TEE (time of detection less than 28 days)
 - Patients >/= 18 years old
 - CHA2DS2-VASc Score >/= 1
 - CrCL >/= 30 mL/min (Cockcroft-Gault)
 - Women with childbearing potential have to practice a medically accepted contraception during the trial and a negative pregnancy test (serum and urine) should be existent before trial onset. In case of Phenprocoumon as study medication a reliable contraception has to be continued three month after last intake of Phenprocoumon, due to the teratogenic potential of Marcumar®. Reliable contraceptive methods are systematic contraceptives (oral, implant,
 injection) and diaphragm or condoms with a spermicide. Women that are sterile by surgery or for more than two years postmenopausal can participate in the trial.
 - Ability of patient to understand the character and the individual consequences of the clinical trial
 - Signed and dated informed consent before start of any specific trial procedures
 
 |  | 
| E.4 | Principal exclusion criteria | 
| - Patients > 80 years - Low body weight (< 50 kg)
 - Previous failure of LAA thrombus resolution with a VKA or factor Xa antagonist
 - Occurrence of LAA thrombus under long-term treatment (> 3 months) with vitamin K
 antagonists with an exception in the case of continued INR out of the target range
 - Contraindications for oral anticoagulation therapy
 (see current Fachinformation for Pradaxa® (150 mg) and Marcumar® (3 mg))
 - History of heart valve disorder (i.e., prosthetic valve or hemodynamically relevant valve disease)
 - Valvular heart disease requiring intervention (including mechanical valves)
 - Acute myocardial infarction or MI within the last 26 weeks
 - Acute coronary syndrome (e.g. instable angina pectoris, STEMI, NSTEMI)
 - Chronic Heart Failure (> NYHA IIIa)
 - Previous haemorrhagic stroke
 - TIA within the last 90 days
 - Clinical relevant bleeding within the last 26 weeks
 - Acute and subacute bacterial endocarditis
 - Recurrent pulmonary embolism
 - Esophagitis, gastritis and gastroesophageal reflux
 - Thrombocytopenia or functional platelet defects
 - Congenital or acquired coagulation or haemorrhagic disorders
 - Liver diseases (liver enzymes >2 ULN)
 - Renal insufficiency (CrCL below 30 mL/min)
 - Pre-treatment with Dabigatran in doses higher than 110 mg bid
 - Concomitant treatment with rivaroxaban, apixaban, and in case of approval during the course of the trial, also edoxaban
 - Concomitant treatment with irreversible cyclooxygenase inhibitors (e.g. ASA) at doses
 > 100 mg/d.
 - Concomitant treatment with high doses of Adenosine diphosphate (ADP) receptor
 inhibitors (e.g. clopidogrel) at doses > 75 mg/d
 - Combined treatment with Adenosine diphosphate (ADP) receptor inhibitors
 (e.g. clopidogrel) and irreversible cyclooxygenase inhibitors (e.g. ASA) in any dose
 combination
 - Planned treatment with long-term oral anticoagulants for alternative indications
 - Concomitant treatment with P-glycoprotein (P-gp) inhibitors, i.e. verapamil.
 - Need for continued treatment with ticlopidine, ticagrelor, prasugrel, systemic
 ketoconazole, itraconazole, posaconazole, cyclosporine, tacrolimus, dronedarone,
 rifampicin, phenytoin, carbamazepine, St. John’s Wort or any cytotoxic/
 myelosuppressive therapy
 - Concomitant treatment with medication not permitted (see chapter 5.2)
 - Planned surgical intervention during expected study participation or
 previous surgical interventions within the last 30 days
 - Other significant risk factors for bleeding complications (e.g. malignancy)
 - Pregnancy and lactation.
 - History of hypersensitivity to the investigational medicinal product or to any drug with
 similar chemical structure or to any excipient present in the pharmaceutical form of the
 investigational medicinal product.
 - Participation in other clinical trials during the present clinical trial or within the last
 90 days.
 - Medical or psychological condition that would not permit completion of the trial or signing
 of informed consent.
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| Time to complete LAA thrombus resolution |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point |  | 
| E.5.2 | Secondary end point(s) | 
| - Complete LAA thrombus resolution until week 6 (yes/no) - Change in LAA thrombus size under treatment
 - Occurrence of any adverse event
 - Occurrence of major bleedings (see chapter 8.9.1)
 - Occurrence of strokes (all-type, haemorrhagic, ischemic) ascertained by CCT or cMRT
 - Occurrence of TIAs
 - Occurrence of cardiovascular events requiring hospitalization (e.g. myocardial infarction,
 acute coronary syndrome, severe tachyarrhythmia)
 - Occurrence of other thromboembolic events (e.g. deep vein thrombosis, pulmonary embolism)
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| week 3 week 4
 week 6
 week 7
 |  | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis | No | 
| E.6.2 | Prophylaxis | No | 
| E.6.3 | Therapy | Yes | 
| E.6.4 | Safety | Yes | 
| E.6.5 | Efficacy | Yes | 
| E.6.6 | Pharmacokinetic | No | 
| E.6.7 | Pharmacodynamic | No | 
| E.6.8 | Bioequivalence | No | 
| E.6.9 | Dose response | No | 
| E.6.10 | Pharmacogenetic | No | 
| E.6.11 | Pharmacogenomic | No | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | No | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) | No | 
| E.7.1.1 | First administration to humans | No | 
| E.7.1.2 | Bioequivalence study | No | 
| E.7.1.3 | Other | No | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) | Yes | 
| E.7.3 | Therapeutic confirmatory (Phase III) | No | 
| E.7.4 | Therapeutic use (Phase IV) | No | 
| E.8 Design of the trial | 
| E.8.1 | Controlled | Yes | 
| E.8.1.1 | Randomised | Yes | 
| E.8.1.2 | Open | Yes | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | No | 
| E.8.1.5 | Parallel group | No | 
| E.8.1.6 | Cross over | No | 
| E.8.1.7 | Other | No | 
| E.8.2 | Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) | Yes | 
| E.8.2.2 | Placebo | No | 
| E.8.2.3 | Other | No | 
| E.8.2.4 | Number of treatment arms in the trial | 2 | 
| E.8.3 | The trial involves single site in the Member State concerned | No | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | Yes | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 14 | 
| E.8.5 | The trial involves multiple Member States | No | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | No | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | No | 
| E.8.7 | Trial has a data monitoring committee | Yes | 
| E.8.8 | Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 3 | 
| E.8.9.1 | In the Member State concerned months | 0 | 
| E.8.9.1 | In the Member State concerned days | 0 |