my father has heart failure, he has just had his left stents re-done after 13 years, this was successful they said. he is now waiting for a new procedure to drill the calcified right side....for many years he ha\s had a phlegm cough, he also has lung fibrosis.....over the last few weeks he has a dry persistent cough that seems to start each time he tries to talk, it is really distressing him, he is shattered and has a head ache from all this coughing, no-one seems to be able to do anything about it.