'Cardiac asthma' is just an old-fashioned term used to describe the wheeze that some people get in assocation with left ventricular (heart) failure and pulmonary oedema (fluid on the lungs). There's no association with bronchial asthma.
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Unusual Asthma Triggers
DofE expedition with asthma 
silent reflux & asthma
asthma & respiratory illnesses 
Asthma attack and chest infection 
