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Lynn Caruana Department of
Cardiology, Western Infirmary, Glasgow G11 6NT
Correspondence to: J
McMurray j.mcmurray{at}bio.gla.ac.uk
Objectives:
To characterise the clinical
features of patients with suspected heart failure but preserved left
ventricular systolic function to determine if they have other potential
causes for their symptoms rather than being diagnosed with "diastolic
heart failure."
Design:
Prospective descriptive study.
Setting:
Outpatient based direct access
echocardiography service.
Participants:
159 consecutive patients with suspected
heart failure referred by general practitioners.
Main outcome measures:
Symptoms (including shortness
of breath, ankle oedema, and paroxysmal nocturnal dyspnoea) and history
of coronary heart disease and chronic pulmonary disease. Transthoracic
echocardiography, body mass index, pulmonary function tests, and electrocardiography.
Results:
109 of 159 participants had suspected heart failure in the absence of left ventricular systolic dysfunction, valvular heart disease, or atrial fibrillation. Of these 109, 40 were
either obese or very obese, 54 had a reduction in forced expiratory
volume in 1 second to
70%, and 97 had a peak expiratory flow rate
70% of normal. Thirty one patients had a history of angina, 12 had
had a myocardial infarction, and seven had undergone a coronary artery
bypass graft. Only seven patients lacked a recognised explanation for
their symptoms.
Conclusions:
For most patients with a diagnosis of
heart failure but preserved left ventricular systolic function there is
an alternative explanation for their symptoms
for example, obesity,
lung disease, and myocardial ischaemia
and the diagnosis of diastolic
heart failure is rarely needed. These alternative diagnoses should be
rigorously sought and managed accordingly.
© BMJ 2000
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