The CPT, in which the response of BP to the stimulus of external cold is measured, has been used to identify hyperreactor individuals who might develop hypertension.
* Based on the reactivity to CPT the individuals were divided into two groups, i.e., normoreactors and hyperreactors based on the work of Hines.
Hyperreactor: Those subjects in whom the systolic BP rise more than 20 mmHg and or diastolic BP more than 15 mmHg or cross the ceiling value of systolic BP more than 145 mmHg and diastolic more than 95 mmHg.
60 young healthy volunteers aged 17-27 years who were hyperreactors to cold pressor test participated in the study.
and/or 15 mmHg of diastolic blood pressure and hyperreactor [showing increase rise than above].
Hines and Brown later on modified the old criteria of hyperreactor and gave 'new' definition of hyperreactor and those having a rise of 15 mmHg diastolic or greater and a maximal basal diastolic pressure exceeding 90 mmHg.
who have positive family history were more vulnerable to future hypertension due to their sympathetic overactivity.
They observed the effect of pain caused cold stress in the form of rise in blood pressure and on this basis subjects could be classified as hypo-reactors or hyperreactors. The hyper-reactors to cold stress are likely to develop cardiac disorders later on in any phase of life.
These hyperreactors practiced yoga regularly for three months and after this period the 14 volunteers became hypo-reactors, whereas no change in the hyper-reactivity was observed in six volunteers.
because some children are hyperreactors
," he added.
One thought is that some people with PPH may be hyperreactors
. This means they are unusually susceptible to agents that cause constriction, or narrowing, of blood vessels.
CONCLUSION: Elevated SBP and DBP in response to cold pressor test and significantly higher number of hyperreactors
are observed in the children of hypertensive parents.