Normal left ventricular systolic function with ejection fraction of 55%Normal left ventricular internal diameter end-systole of 3.7 cm (normal 2-4 cm) on first admission for asthma exacerbation.LVIDs: left ventricular internal diameter end systole; ESV: end-systolic volume; EF: ejection fraction; SV: stroke volume; LA: left atrium; LA Diam: left atrial diameter