ICD-11 definition : Vitamin B1 deficiency manifests itself principally with changes involving the nervous
system (polyneuritis and paralysis of the peripheral nerves), the cardiovascular system
(cardiac insufficiency and generalized oedema), and also the gastrointestinal tract
(constipation, vomiting, and abdominal pain).;
Vitamin B1 deficiency manifests itself principally with changes involving the nervous
system (polyneuritis and paralysis of the peripheral nerves), the cardiovascular system
(cardiac insufficiency and generalized oedema), and also the gastrointestinal tract
(constipation, vomiting, and abdominal pain).