Assertion: thrombosis's symptom | /r/HasProperty | new york heart association
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text: (less than 1 cm in diameter or 0.8 cm2 in area), recent onset (fewer than 14 days) and associated with mild symptoms (New York Heart Association, or NYHA, class I-II) can be treated initially with a trial of 24 to 48 hours of intravenous unfractionated heparin with a goal activated partial thromboplastin time (APTT) of 1.5 to 2 times the control value.