(1) Assessment of the prevalence of acid GER in children with symptoms suggestive of ALTE, (2) Clinical evaluation of symptoms in children with ALTE and acid GER, (3) Assessment of efficacy of conservative treatment in children with reflux and ALTE symptoms, (4) Natural regression of the disease in children with ALTE Results: From among 264 examined children who underwent 24-hour esophageal pH monitoring acid GER was confirmed in 170 (64.4%), and ALTE in 8 (4.8%)