Table 8.

A comparison of the existing Lake Louise criteria for diagnosis of HAPE and the proposed criteria of the present study.

Existing criteria (Lake Louise)	Proposed criteria
History of recent ascent to high altitude	History of arrival at high altitude (2700–3500 m) within last 5 days
Any two of the following symptoms	Symptoms
• Dyspnoea at rest	• Breathlessness
• Cough	• Cough
• Weakness or decreased exercise performance	• Chest discomfort
• Chest tightness or congestion	• Headache
Any two of the following signs	Signs
• Crackles or wheeze in at least one lung field	• Heart rate > 95 beats/min
• Central cyanosis	• Respiratory rate > 21/min
• Tachycardia	• SPO2 < 86%
• Tachypnoea