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Cardiotoxicology
VM 605 Final
28
Veterinary Medicine
Professional
09/27/2011

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Cards

Term
Cardiac glycoside mechanism
Definition
inhibit Na-K-ATPase pumps
Term
Cardiac glycoside sources
Definition
Oleander, Foxglove, Lily of the Valley, Kalanchoe, Broad-leaved milkweed, Bufo Marianis toads, Digoxin
Term
Digoxin
Definition
cardiac glycoside
different individual metabolism
used for congestive heart failure
Term
Cardiac glycoside signs
Definition
same signs no matter the source
milk GI upset
hyperkalemia, hyponatremia
arrythmias
extracardiac and cardiac signs
Term
Cardiac glycoside treatment
Definition
emesis
activated charcoal (binds up to 96%)
IV fluids without calcium
monitor potassium
antiarrythmic agents as needed
Digibind
rinse mouth out or emesis if toad
Term
Grayanotoxins mechanism
Definition
bind to sodium channels of nerve, heart, skeletal muscle
increase membrane permeability of Na
prolonged depolarization
Term
Grayanotoxins sources
Definition
Rohododendron, Azalea, Laurels, Japanese pieris
Term
Grayanotoxins signs
Definition
bloat, abdominal pain, GI signs
depression
negative chronotropic action and sinus arrest
projectile vomiting in goats
Term
Grayanotoxins treatment
Definition
supportive care
Term
Japanese Yew mechanism
Definition
berry is not toxic but all other parts of plant is
inhibit normal exchange of Na and Ca in myocytes
Term
Japanese Yew signs
Definition
sudden death
Term
White Snake Root
Definition
in horses causes cardiac necrosis
in cattle causes muscle tremors
Term
Gossypol
Definition
from cottonseed
causes congestive heart failure in swine
Term
Ionophores
Definition
monensin
causes caridac lesions in horses
affects ruminants with skeletal muscle
cats - peripheral neuropathy
dogs- paresis reversible
Term
Paraquat mechanism
Definition
herbicide that is not appropriately diluted
pulmonary toxicant
concentrates in lung
peaks 4-5 days after exposure
often used for malicious poisoning
Term
Paraquat signs
Definition
dermal irritation
GI signs
pulmonary fibrosis
Term
Paraquat mechanism
Definition
forms free radicals in lungs
superoxide free radical
lung heals by fibrosis
not able to expand lungs
Term
Paraquat treatment
Definition
aggressive decontamination
ACE inhibiter within 1 hour
DO NOT GIVE OXYGEN
supportive care
Term
Diquat
Definition
cousin to paraquat
not taken up by lung
vomiting and diarrhea
Term
Avocado signs
Definition
Persin - poison
problem in ruminants, horses, rabbits, birds
noninfectious mastitis in small ruminants
myocardial necrosis
colic in horses
Term
Acute Bovine Pulmonary Emphysema and Edema
Definition
lush pasture, corn
purple mint
moldy sweet potatoes
Term
Tryptophan mechanism
Definition
fog fever
due to abrupt change in forage quality
takes about 2 weeks
tryptophan converted to 3-MI which destroys clara cells and type I pneumocytes in lungs
replaces it with type II pneumocytes whcih don't produce surfactant
Term
Tryptophan signs
Definition
difficulty breathing
distressed
sound like pneumonia without fever
exercise intolerance
pulmonary edema
Term
Tryptophan treatment
Definition
remove pasture
NSAIDs, diuretics, bronchodilators
gradually introduce new forage
ionophores provide partial protection
Term
Perilla Mint and Moldy Sweet Potatoes mechanism
Definition
kills type I pneumocytes
replaced by type II pneumocyte
same signs and treatment as tryptophan
Term
Fumonisms
Definition
horses- puts holes in brain
pigs - pulmonary edema
Term
Teflon
Definition
polytetrafluroethylene is relased when cooking
affects birds and kills them
depends on air ventilation
poor prognosis
Term
Petroleum distillates
Definition
if aspirated, end up with aspiration pneumonia
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