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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT01451320
Other study ID # 11
Secondary ID
Status Completed
Phase N/A
First received September 29, 2011
Last updated October 11, 2011
Start date January 1993
Est. completion date December 2009

Study information

Verified date October 2011
Source Kartal Kosuyolu Yuksek Ihtisas Education and Research Hospital
Contact n/a
Is FDA regulated No
Health authority Turkey: Ministry of Health
Study type Interventional

Clinical Trial Summary

Despite high mortality and morbidity, the best treatment strategies for prosthetic valve thrombosis (PVT) have been controversial. In this study the investigators wanted to identify the most effective and safe regimen among different thrombolytic strategies.Transesophageal echocardiography (TEE) guided thrombolytic treatment was administered to 182 consecutive patients with PVT in 220 different episodes (156 women, mean age 43.2±13.06 years) between 1993 and 2009. These regimens included rapid streptokinase (Group I, 16 episodes), slow streptokinase (Group II, 41 episodes), high dose (100 mg) tissue plasminogen activator (t-PA) (Group III, 12 episodes), half-dose (50 mg) slow infusion (6-hours) of t-PA without bolus (Group IV, 27 episodes), and low dose (25 mg) and slow infusion (6-hours) of t-PA without bolus (Group V, 124 episodes). The study endpoints were thrombolytic success and in-hospital mortality and non-fatal complication rates.


Description:

One hundred and eighty two consecutive in-hospital patients with 220 episodes of PVT between 1993 and 2009 were included in the study. The patients were enrolled after informed consent if there was no contraindication, to thrombolysis. The study was approved by the local Ethics Board. The patient demographics, past medical history, date of the operation, type and make of the prosthetic valve, rhythm disorders, aspirin use, NYHA functional capacity, leading symptoms and international normalization ratio (INR) values at the time of admission were prospectively entered into a database.The diagnosis of PVT was verified each time by transesophageal echocardiography (TEE) when a patient was admitted with thromboembolism or persistently low INR for the preceding consecutive 3 months and when a transthoracic echocardiography (TTE) documented prosthetic valve dysfunction or thrombus. All patients underwent TTE and TEE examination before and after the thrombolysis sessions. The cross sectional area and the longest diameter of the thrombus were measured on TEE recordings


Recruitment information / eligibility

Status Completed
Enrollment 182
Est. completion date December 2009
Est. primary completion date December 2009
Accepts healthy volunteers No
Gender Both
Age group N/A and older
Eligibility Inclusion Criteria:

- Patients with prosthetic valve thrombosis

Exclusion Criteria:

- Large left atrial thrombus

- Recent (<3 weeks) ischemic stroke

- Hemorrhagic stroke

- Early (<4 days) postoperative period

- Traumatic accident <4 weeks

- Bleeding diathesis †

- Intracranial mass

- Active internal bleed

- Aortic dissection

Study Design

Allocation: Non-Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment


Related Conditions & MeSH terms


Intervention

Drug:
Streptokinase
3-hour infusion of 1.5 million units of streptokinase (16 patients, 16 episodes), repeat once 24 hours later if needed (maximum total dose 3 million units)
Streptokinase
24-hour infusion of 1.5 million units of streptokinase (41 patients, 41 episodes), repeat once 24 hours later if needed (maximum total dose 3 million units).
Tissue plasminogen activator
5-hour infusion of 90 mg t-PA (Tissue plasminogen activator) after 10 mg bolus (10 patients, 12 episodes), repeat once 24 hours later if needed (maximum total dose 200 mg)
Tissue Plasminogen Activator
6-hour infusion of 50 mg t-PA (Tissue plasminogen activator) without bolus (27 patients, 27 episodes), repeat once 24 hours later up to 3 times if needed (maximum total dose 150 mg).
Tissue Plasminogen Activator
6-hour infusion of 25 mg t-PA (Tissue plasminogen activator) without bolus (108 patients, 124 episodes), repeat once 24 hours later up to 6 times if needed (maximum total dose 150 mg).

Locations

Country Name City State
Turkey Kosuyolu Kartal Heart Training and Research Hospital Istanbul

Sponsors (1)

Lead Sponsor Collaborator
Kartal Kosuyolu Yuksek Ihtisas Education and Research Hospital

Country where clinical trial is conducted

Turkey, 

References & Publications (1)

Ozkan M, Kaymaz C, Kirma C, Sönmez K, Ozdemir N, Balkanay M, Yakut C, Deligönül U. Intravenous thrombolytic treatment of mechanical prosthetic valve thrombosis: a study using serial transesophageal echocardiography. J Am Coll Cardiol. 2000 Jun;35(7):1881-9. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Primary Thrombolytic success In the absence of fatal or nonfatal major complications;
Obstructive thrombus:
Doppler documentation of the resolution of increased gradient and decreased valve area.
Clinical improvement in symptoms.
Reduction by =75% in major diameter or area of the thrombus. Complete success was defined when all 3 criteria were met and partial success was defined as less than 3.
Nonobstrucive thrombus:
Complete success: =75% reduction in thrombus area.
Partial success: 50%-75% reduction in thrombus area.
24 hours Yes
Primary Non-fatal complication rates Nonfatal major complication: Ischemic stroke, intracranial hemorrhage, embolism (coronary or peripheral), bleeding requiring transfusion.
Nonfatal minor complication: Bleeding without need for transfusion, TIA.
participants will be followed for the duration of hospital stay, an expected average of 3 weeks Yes
Primary In-hospital mortality All cause in-hospital mortality. participants will be followed for the duration of hospital stay, an expected average of 3 weeks Yes
See also
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Recruiting NCT02318342 - Assessment of TRanscathetEr and Surgical Aortic BiOprosthetic Valve Thrombosis and Its TrEatment With Anticoagulation N/A