Yes I fixed the ventricle/atrium word in my post when I spotted it :-)
Firstly Phoebe.. I am not a doctor. However I read and google from time to time.
Are you SURE you had an echo cardiogram or was it simply an ECG?? EDIT: The names sound similar but they are very different.
If you thought you were having a heart attack and they performed an echocardiogram then the full results of that might tell you your left-ventricle ejection fraction.
Maybe there's a "full" echocardiogram study and a "cheap and cheerful" version. I really don't know if there are different types or not. Getting them to send you the full results might save you some money by avoiding a subsequent echo cardiogram test. I'd want the results in my medical files anyway.
Next thing... the left atrium is connected to the left ventricle by a valve. There are several reasons why the left atrium can be enlarged. One reason can be caused by an issue with the left ventricle. Do you see where this may be leading?
If you get those echo cardiogram results and they tell you that your left ventricle ejection fraction is too low then you need to know that. If that's the case, there is no point having the ASV titration test because no one will write the prescription for an ASV. Even if they DID write the prescription it would be due to incompetence and I would not be happy knowing that you were using ASV until the latest study is published and I know exactly what it says.
There's a lot of "ifs" in all the above and I don't want to freak you out.... but you and your doctor(s) need to know the answers.
Finally, Please don't shoot the messenger but you may also want to read the "tips" section of this webpage for left atrial enlargement.
There are a few that apply to you given what you've told us.
https://www.healthline.com/health/left-a...prevention
Tips
Keep high blood pressure and high cholesterol under control.
Eat heart-healthy foods.
Avoid using alcohol and tobacco products.
Maintain an active lifestyle.
Try to lose weight if you’re overweight.
Reduce stress, as this can lead to problems with heartbeat.
Let your doctor know if you have a family history of heart or cardiovascular conditions.