Q1 Exam 1 Flashcards
what does a differential cyanosis in puppies signify
reverse PDA
pulse pressure
difference between systolic and diastolic pressures
2 causes of pulse deficits
a fib and PVCs
pulsus paradoxus
reduced pulse pressure during inspiration (normal) but can be exaggerated with cardiac tamponade
murmur grading scale
1- less than normal heart sounds
2- heart sounds louder still, but clearly there
3- radiates to both sides of chest
4- no normal heart sounds heard
5- palpable thrill
6- heard off of chest
AV valve murmurs
heard at apex, plateau-shaped systolic (also DCM)
semilunar valve murmurs
ejection murmur at heart base (VSD and HCM also)
diastolic murmurs
PDA, semilunar regurg, mitral stenosis
in canine cardiac disease, when is there respiratory effort?
inspiration
what can a long or tall p-wave signify on ECG
long = LAE
tall = RAE
normal QRS duration
dog = 0.06s
cat = 0.04s
supraventricular
originates above the bundle of his
wandering pacemaker
p-wave gets taller during faster heart rates (vagal)
sinus bradycardia
parasympathetic, give atropine
sick sinus syndrome
fast heart rates then nothing, causes syncope in mini schnauzer, needs pacemaker
causes of atrial standstill
hyperkalemia, atrial myopathy, artifact
first degree AV block
prolonged PR (no dropped beats)
second degree AV block type I
PR prolongs and then dropped beat, tx atropine challenge
second degree AV block type II
PR constant, atropine challenge
third degree AV block
complete dissociation, needs pacemaker
APCs
LAE maybe, non-compensatory pause (HR finds new rhythm)
a fib
fast irregular rhythm with narrow QRS, no p waves
VPCs
premature wide QRS with compensatory pause, tx holter
wide complexes origin (left or right)
positive = right
negative = left