The prognostic importance of left ventricular outflow obstruction in hypertrophic cardiomyopathy varies in relation to the severity of symptoms
Camillo Autore, MD*,*,
Paola Bernabò, MD ,
Caterina Stella Barillà, MD*,
Paolo Bruzzi, MD, PhD and
Paolo Spirito, MD
* Divisione di Cardiologia, Ospedale Sant'Andrea, Università "La Sapienza", Rome
Divisione di Cardiologia, Ente Ospedali Galliera, Genoa
Servizio di Epidemiologia Clinica, Istituto Nazionale Ricerca sul Cancro, Genoa, Italy

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Figure 1 Kaplan-Meier estimates of the proportion of patients with or without left ventricular obstruction who died of cardiovascular causes, among the overall 526 hypertrophic cardiomyopathy (HCM) study patients.
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Figure 2 Kaplan-Meier estimates of the proportion of patients who progressed to New York Heart Association (NYHA) functional class (FC) III to IV, among the 486 patients with hypertrophic cardiomyopathy (HCM) in FC I or II at initial evaluation.
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Figure 3 Kaplan-Meier estimates of the proportion of patients with or without left ventricular obstruction who developed either paroxysmal or chronic atrial fibrillation (AF), among the 440 hypertrophic cardiomyopathy (HCM) patients without AF at initial evaluation.
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