CARDIO Flashcards
Prevalence of AF in TB?
AF 5% TB and 25 to 64% recurrence. If you have a TB with AF then you have at least 25% risk to have another AF
ACVIM 2024
what threshold is used for the nbr of premature depolarizations that are abnormal ?
> 2 PD peak exercise
5 PD recovery immediately
supreventricular premature complexes are an uncommon cause of poor perf but ventricular prematures complexes depend on complexity
ACVIM 2024
What are the factors associated with premature depolarizationsor complex arrhthmias?
1 max HR and time >199bpm
2punctuated deceleration
3hyperlactatemia, 4hypercapnia
5increased age
6poor perf
7higher level of competition
8treadmill exercise tests
9exercise associated upper respi tracts obstructions
10national hunt horses
arrythmias not associated with lower airways diseases and not associated with hypoxemia
ACVIM 2024
ECG qualities: how many artifacts/lost ECG?
up to 1/3 (26% equimetre, televet)
ACVIM 2024
Howa can we predict which horses will dvlp arrythmias?
auscultation
ECG (need 12 leads ecg) before, during, after
echocardio
ACVIM 2024
How many deaths betw TB, QH, QB by race fatality?
TB 2,3/1000
QH 1,5/1000
SB 0,3/1000
50% musculoskeletal
15% sudden death
ACVIM 2024
when do occur the sudden death ? sudden death= acute collapse and death during or immediately after exercise.
most during training 53-60% occur during training VS 13-25% TB racing facilities
ACVIM 2024
What is the particularity of SB about musculoskeletal fatalities and exercise associated sudden death?
SB have a lower frequency of musculoskeletal fatalities (0,059/1000) and higher proportion of EASDs (49-66%)
ACVIM 2024
What are the risk factors for exercise associated sudden death?
1Seasons: summer>Au>Sp>winter
2surface: dirt (terre)>turf>synth
3distance short
4state-bred race decrease
5purse value high
6sex (S>G>F)
7 distance raced (carreer) short
8 previous wins career high
9 starts in previous 1-3-6months varied
10horse start as claimer (niveau plus bas pour être acheté en compétition)increase
11 days since last lay-up (epargné) vary
12presence on vet list icnrease
13 furosemide on raceday increase
ACVIM 2024
TB sudden deaths what is the % of cardiac pbl?
30-40% cardiac pbl
ACVIM 2024
exercise associated sudden cardiac death related to what ?
thought to be related to fatal arrythmias. Frqt no significant on necropsy: pulmo hemorrhage, congestion, edema. Training>racing.
EASDs less likely to be uncastrated male and more likely youngs, fewer lifetime starts
what is the suspected leading cause of sudden death? what is the goal?
channelopathies. genetic.
use ecgs and genetic to reduce risk of SCD in horses (note that AF is the most common cardiac arrythmia causing poor perf and PD isolated is of clinical uncertain significance)
ACVIM 2024
WHat % of TB develpo complex arrythmias at exercise?
complex 25%, (AF 5%-
ACVIM 2024
