You are presented with a paragraph from a COVID-19 literature. Classify the topics of this piece of text by choosing from the following categories:

- Epidemic Forecasting: The content relates to predictions about the spread of COVID-19.
- Treatment: The paragraph discusses therapeutic methods or medication for COVID-19.
- Prevention: The content covers measures to prevent the spread of COVID-19.
- Mechanism: The paragraph explains the biological mechanisms of the virus.
- Case Report: The content is a report of a COVID-19 case.
- Transmission: The paragraph discusses how COVID-19 is transmitted.
- Diagnosis: The content is about diagnosing COVID-19 in individuals.

Your classification should be provided as an element within a JSON array. The array should be formatted with topics enclosed in double quotes and separated by commas, following the JSON format, for example: ["Topic1", "Topic2", ...]. Include all applicable topics within the array. Your output should be a valid JSON array, and no additional text should be included in your response.

Article:

Hypercoagulability has been found in patients diagnosed with the novel coronavirus 19 (COVID-19) and has been identified as a major cause of morbidity and mortality. Herein, we report the challenge in managing a patient presenting with a 5 day history of COVID-19 diagnosis, complicated by deep venous thrombosis, pulmonary embolism and ischemic stroke in the setting of atrial septal aneurysm, presumed patent foramen ovale and paradoxical embolism, identified to have clots in transit on echocardiogram. The application of anticoagulation was felt to be high risk. The patient was transferred to a tertiary facility where the patient underwent thrombus aspiration and was eventually complicated by hemorrhagic conversion of the stroke.
["Case Report"]