The THC Cardiovascular Meta-Analysis Had No Pooled Human Blood-Pressure or Blood-Flow Result
A 2018 THC cardiovascular meta-analysis could pool human heart-rate findings but lacked sufficient human evidence for blood pressure or regional blood flow. Its human result should not be expanded to those unpooled endpoints.
The available human comparison was narrower
The review’s human evidence concerned acute THC administration and heart rate. Its discussion explicitly identifies insufficient data to meta-analyze blood pressure or regional flow. Favorable or unfavorable animal findings on those endpoints cannot supply a missing pooled human estimate.
Missing synthesis is different from a null finding
The absence of an adequate pool does not establish that THC leaves human blood pressure unchanged. It also does not establish that human responses match the animal pressure reductions. Those would be additional empirical claims. Heart rate, pressure and blood flow are related physiological variables but are not interchangeable measurements.
The historical scope remains important
The search extended through April 2017. The gap describes the eligible evidence available to that review, not a claim that no subsequent human research exists. For an opinion relying on the synthesis, identify which endpoint was actually supported and which remained unpooled. The paper establishes neither an individual cardiovascular diagnosis nor an impairment threshold from pulse alone. Its central limitation is evidentiary: the human heart-rate result did not answer every cardiovascular question.
Related analysis: the study’s broader findings and limitations.
