OBJECTIVE To determine whether an intravenous heparin dosing nomogram based on body weight achieves therapeutic anticoagulation more rapidly than a "standard care" nomogram. DESIGN Randomized controlled trial. SETTING Two community teaching hospitals in Phoenix, Arizona, and Rochester, New York. PARTICIPANTS One hundred fifteen patients requiring intravenous heparin treatment for venous o...

Normal pregnancy is a hypercoagulable state with an increase in coagulation factor levels and decrease natural anticoagulation. However, higher prolonged activated partial thromboplastin time (APTT), prothrombin (PT), increased D-dimer (DD2), mean platelet volume seen women preeclampsia at the of onset. In addition, endothelial dysfunction occurs before clinical symptoms preeclampsia. Therefore...

BACKGROUND The activated partial thromboplastin time (APTT) is used to adjust heparin sodium dosage. However, warfarin sodium is often administered concomitantly with heparin and may also affect the APTT and, therefore, heparin dose. We performed a prospective cohort study to quantify the effect of warfarin on the APTT in patients who are being treated with heparin. METHODS Serial assays of A...

This study was undertaken to observe the changes in coagulation and platelet profile, and findings were correlated with their outcome. Forty consecutive children with severe falciparum malaria were studied for their coagulation status, i.e. prothrombin time (PT), activated thromboplastin time (APTT), thrombin time (TT) and anti-thrombin-III (AT-III), platelet profile (platelet count, platelet a...

The activated partial thromboplastin time (APTT) assay is a basic hemostatic assay based on the time it takes for clots to form in plasma samples after the addition of calcium chloride. It is used to screen for various coagulation disorders. Several previous reports have suggested that magnesium (Mg) might contribute to coagulation reactions by binding to specific coagulation proteins. We inves...

AIMS To evaluate the relationship between activated partial thromboplastin time (aPTT) and clinical outcomes in the Global Use of Strategies to Open Occluded Coronary Arteries (GUSTO-V) trial comparing standard-dose reteplase to half-dose reteplase and abciximab. METHODS AND RESULTS We analysed data on 11,420 patients receiving unfractionated heparin. Peak aPTT levels recorded during the hosp...

BACKGROUND Safety of atrial fibrillation (AF) ablation in conditions of periprocedural therapeutic international normalized ratio (INR) in combination with heparin is still uncertain, and little is known about the pre-procedural therapeutic INR influence on bleeding complications (BC) in this method. METHODS AND RESULTS The subjects were 150 consecutive patients who underwent catheter ablatio...

We report a case of patient with recurrent hematomas while on anticoagulation for pulmonary embolism and prolonged hospital stay due to delayed diagnosis acquired hemophilia A. Acquired A is rare autoimmune bleeding disorder autoantibodies directed against coagulation factor VIII (FVIII), leading an FVIII deficiency. isolated activated partial thromboplastin time (aPTT) in warrants workup This ...

Unfractionated heparin (UFH) is widely used in the treatment and prophylaxis of thrombosis. The anticoa‐ gulant effect of UFH is monitored according to activated partial thromboplastin time (APTT). However, there are reports of cases in which hemorrhagic complications develop despite APTT being maintained within the therapeutic range. This indicates there are problems with the monitoring method...

Although nanotechnology has provided a rich variety of nanomaterials (1-100 nm) for in vivo medical applications, the blood compatibility of all these nanobiomaterials is still largely unexamined. Here, we report the preparation of blood-compatible carbon nanotubes (CNTs) that potentially represent the building blocks for nanodevices having in vivo applications. Activated partial thromboplastin...