More dyspnea

A 53 year old lady is brought in with acute onset severe dyspnea of 2 hours duration with no associated chest or back pain. She does not have a headache, nausea or visual disturbances, is not confused and moves all 4 limbs equally. This is her first such episode. She has had hypertension for nearly 20 years now, with no etiology found. She defaulted on treatment and follow up nearly a decade ago. No other comorbidities are noted and she is not on any drugs.