A 68-old-year male was brought to the Emergency Unit of the hospital after having experienced a sudden onset of dyspnoea and tachypnoea together with pleuritic chest pain. The laboratory findings showed the following: P a CO 2 : <33mmHg, P a O 2 : <80mmHg and increase in A-a gradient. Other investigations performed included ventilation and perfusion scan as well as measurement of D-dimers and the diagnosis of pulmonary embolism was made. Which imaging/laboratory findings are most likely to be observed in this condition?

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A 68-old-year

male was brought to the Emergency Unit of the hospital after having experienced

a sudden onset of dyspnoea and tachypnoea together with pleuritic chest pain.

The laboratory findings showed the following: P

_aCO₂

<33mmHg, P

_aO₂

: <80mmHg and increase in A-a gradient.

Other investigations performed included ventilation and perfusion scan as well

as measurement of D-dimers and the diagnosis of pulmonary embolism was made.

Which imaging/laboratory

findings are most likely to be observed in this condition?

Ventilation scan	Perfusion scan	D-dimers
Normal	Abnormal	Increased

Ventilation scan	Perfusion scan	D-dimers
Normal	Abnormal	Decreased

Ventilation scan	Perfusion scan	D-dimers
Abnormal	Normal	Increased

Ventilation

scan

Perfusion

scan

D-dimers

Abnormal

Increased

❌

Ventilation scan	Perfusion scan	D-dimers
Abnormal	Abnormal	Decreased

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