Veterans who are already service connected for PTSD sometimes develop high blood pressure years later and ask whether the two are related. Under 38 CFR 3.310, a condition caused or aggravated by a service-connected disability can itself be service connected - but the link has to be established by medical evidence in the individual case.
This guide explains how the theory works and what the record needs to show. For background, see how hypertension service connection works and our PTSD and mental health series.
The proposed medical mechanism
The theory rests on the physiological effects of sustained stress responses: repeated activation of the sympathetic nervous system, elevated stress hormones, disrupted sleep, and - in some cases - the cardiovascular effects of psychiatric medications. Research on the relationship between chronic psychological stress and blood pressure is ongoing, and findings vary.
That research background does not decide any individual claim. It provides the framework a clinician uses when evaluating whether, for this veteran, the service-connected condition caused or aggravated the hypertension.
Causation versus aggravation
38 CFR 3.310 recognizes two distinct pathways, and they call for different evidence:
- Causation - the service-connected PTSD caused the hypertension to develop
- Aggravation - hypertension existed independently but was made permanently worse by the service-connected PTSD beyond its natural progression
Why the aggravation baseline matters
For an aggravation claim, the regulation contemplates establishing the baseline level of severity before the aggravation occurred. Practically, that means showing what the blood pressure pattern looked like before the PTSD symptoms or treatment affected it, and what changed afterward. Records that bracket that period are what make the comparison possible.
Where veterans start
Every case is different, and there is no obligation at any step. When veterans want to understand what their records actually support, these are the two most common starting points:
- Medical records review
A licensed physician reviews your records for a $250 flat fee and identifies which conditions the available evidence may support. The fee is refunded in full if nothing supportable is identified.
- Nexus letter
When the records support one, a licensed provider writes the medical opinion that addresses the link between your blood pressure condition and your service or an already service-connected disability.
Common weaknesses in these claims
Claims of this kind most often fail on reasoning rather than on the underlying medicine. A conclusory statement that PTSD causes hypertension, without the veteran's specific history, generally carries little evidentiary weight.
- No documented PTSD diagnosis or service connection at the time of the claim
- An opinion that cites general literature without applying it to this veteran
- No discussion of competing risk factors such as family history, weight, or age
- Blood pressure readings that do not meet the confirmation requirement in 38 CFR 4.104
- An aggravation theory with no baseline evidence
Related pathways worth considering
PTSD is frequently associated with other service-connected conditions that independently affect blood pressure - most commonly obstructive sleep apnea. Where both are present, a clinician may address more than one pathway. See hypertension secondary to sleep apnea and our sleep apnea series for how those claims are evaluated.
Veterans working through the mental health side of the record may also find our guides on PTSD ratings and mental health claim evidence useful.
What a complete opinion addresses
A well-supported secondary opinion identifies the pathway, reviews the actual records, explains the mechanism in this veteran's case, addresses competing causes honestly, and states a conclusion under the “at least as likely as not” standard when the evidence supports it. A paid medical records review is where that assessment begins.