Final answer:
The claim that all patients with Dual AVN physiology have Upper and Lower common pathways is false, as these distinct pathways are characteristic of certain types of supraventricular tachycardia, not present in all individuals.
Step-by-step explanation:
The question 'Upper and Lower common pathways are present in ALL patients with Dual AVN physiology' relates to the field of cardiology, specifically electrophysiology. The answer to this question is False. Dual AV node physiology implies the presence of two distinct atrioventricular (AV) nodal pathways, typically termed as 'fast' and 'slow' pathways. However, not all patients have these dual pathways; they are a characteristic feature in patients with certain types of supraventricular tachycardia (SVT), such as AV Nodal Reentrant Tachycardia (AVNRT).