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Sick Sinus Syndrome is rated by the U.S. Department of Veterans Affairs under DC 7010 of 38 CFR § 4.104, DC 7010 across 4 severity tiers (10% / 30% / 60% / 100%). Service connection requires (1) a current diagnosis, (2) an in-service event, injury, or exposure, and (3) a medical nexus opinion linking the two under 38 C.F.R. § 3.303.
Malfunction of the sinus node, the heart's natural pacemaker, causing abnormal heart rhythms
Rating criteria text quoted verbatim from 38 C.F.R. § 4.104 (Cardiovascular system). Source verified 2026-05-15 by ClaimRecon Editorial Team against the Cornell Law CFR mirror; eCFR.gov is the authoritative government source.