I don't know the answer to your question, but that is an interesting one, because many of us with NTM or bronchiectasis do have other health issues like hypertension, CHF or kidney disease. The other factor to keep in mind is whether using 7% saline plus airway clearance can avoid the need for the Big 3, which are hard on the body, including stomach, kidneys and liver.
Have you asked your pulmonologist and/or cardiologist about this? I would be very interested in hearing what they have to say.
Sue