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What causes dilation of the main pulmonary artery?

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Posted on Sat, 23 Jul 2016
Question: ok I got a full body ct and got the results back. they found dilation of the main pulmonary artery to 3,5 cm , the right pulmonary artery to 2.6 cm and the left dilated to 2.3 cm. is this serious and what should I ask for .

I'm a 52 nonsmoking man .
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Answered by Dr. Ilir Sharka (32 minutes later)
Brief Answer:
I would explain as follows:

Detailed Answer:
Hello!

Welcome on HCM!

Regarding your concern, I would like to explain that thoung your main pulmonary artery seems to be dilated and to a lesser degree the right pulmonary artery branch, some influencing factors should be considered (body height and weight (thus BMI), accuracy of CT acquisition [deep insiration phase, etc.], accuracy of measurements and interpretations.

As a general rule, dilated pulmonary artery tree is an indicator of increased body flow and hence increased pulmonary artery pressure.

This may be caused by several conditions, like primary (less likely at your age) or secondary artery hypertension (such as in cases of left heart dysfunction, pulmonary thromboembolism, congenital left to right heart shunts, etc.).

In such case it is necessary to correlate your potential clinical complaints with the above CT findings and also to perform a cardiac ultrasound (ECHO) in order to investigate for any possible cardiac disorders and pulmonary artery value estimation.

Also, some correlations with your body size and especially with aorta dimension (mean pulmonary artery to aorta root ratio) should be investigated.

If ECHO findings are inconclusive, right heart catheterization would be helpful to clarify this issues.

Pulmonary artery dilations may be present even in the absence of an increased pulmonary artery pressure or flow, such as in Marfan disease.


You should discuss with your attending doctor on the above mentioned issues.

Hope you will find this answer helpful.

In case of any further uncertainties, do not hesitate to ask me again.

Kind regards,

Dr. Iliri

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Ilir Sharka

Cardiologist

Practicing since :2001

Answered : 9020 Questions

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What causes dilation of the main pulmonary artery?

Brief Answer: I would explain as follows: Detailed Answer: Hello! Welcome on HCM! Regarding your concern, I would like to explain that thoung your main pulmonary artery seems to be dilated and to a lesser degree the right pulmonary artery branch, some influencing factors should be considered (body height and weight (thus BMI), accuracy of CT acquisition [deep insiration phase, etc.], accuracy of measurements and interpretations. As a general rule, dilated pulmonary artery tree is an indicator of increased body flow and hence increased pulmonary artery pressure. This may be caused by several conditions, like primary (less likely at your age) or secondary artery hypertension (such as in cases of left heart dysfunction, pulmonary thromboembolism, congenital left to right heart shunts, etc.). In such case it is necessary to correlate your potential clinical complaints with the above CT findings and also to perform a cardiac ultrasound (ECHO) in order to investigate for any possible cardiac disorders and pulmonary artery value estimation. Also, some correlations with your body size and especially with aorta dimension (mean pulmonary artery to aorta root ratio) should be investigated. If ECHO findings are inconclusive, right heart catheterization would be helpful to clarify this issues. Pulmonary artery dilations may be present even in the absence of an increased pulmonary artery pressure or flow, such as in Marfan disease. You should discuss with your attending doctor on the above mentioned issues. Hope you will find this answer helpful. In case of any further uncertainties, do not hesitate to ask me again. Kind regards, Dr. Iliri