Cardiology Flashcards
Causes of dilated cardiomyopathy (4)
- Idiopathic
- Infections (viral)
- Alcohol or drug abuse
- Metabolic, vitamin B1 deficiency
Standard systolic heart failure treatment
ACE inhibitors
Beta blockers (metoprolol or carvedilol)
Symptom control with diuretics
Takotsubo cardiomyopathy
Transient regional systolic dysfunction of the LV that can imitate an MI but is associated with absence of significant obstructive CAD or evidence of plaque rupture, often seen in post menopausal women exposed to physical or emotional stress thought to be due to possible catecholamine surge, WILL see EKG findings such as ST elevations in 3 consecutive leads and cardiac enzymes are often positive, but coronary angiography shows absence of plaque rupture or obstruction
Most common cause of restrictive cardiomyopathy
Amyloidosis, sarcoidosis, hemochromatosis, metastatic disease
Kussmaul’s sign
Lack of inspiratory decline or increase in JVP with inspiration, normally inspiration causes JVP to drop because blood gets sucked in
Definitive diagnosis of restrictive cardiomyopathy is made through ___. Often an ___ is the diagnostic test of choice
Endomyocardial biopsy, echocardiogram
Hypertrophic cardiomyopathy has systolic or diastolic dysfunction?
Diastolic dysfunction, becomes stiff and unable to relax
All murmurs except HOCM do what with increased venous return (squat, supine, leg raise) or increased afterload (grip)?
Increased loudness
HOCM does what with increased venous return?
Decrease loudness
What virus is most likely to cause myocarditis?
Coxsackievirus B
Rate determination pattern of an EKG if regular rhythm
300 150 100 75 60 50
Axis of an EKG is determined by these 2 leads
Lead 1 and AVF
Left bundle branch block on EKG
Wide QRS***, broad slurred R in V5 or V6
Right bundle branch block on EKG
Wide QRS***, RsR’ in V1 or V2
Pathologic Q wave definition
A Q wave >1 box in depth or width
3 things that, if present in 2 consecutive leads, indicates heart damage
- Pathologic Q waves
- ST depression or elevation
- T wave inversion
Anterior wall infarction corresponding leads and artery involved
V1-V4, LAD
Lateral wall infarction corresponding leads and artery involved
I, AVL, V5, V6, circumflex
Inferior wall infarction corresponding leads and artery involved
II, III, AVF, RCA
What are the 2 nondihydropyridine ca2+ channel blockers
Verapamil
Diltiazem
1st line pharmacologic for WPW (narrow complex tachyarrhythmia)
Procainamide, opposed to adenosine which is used in others
Unstable bradycardia pharmacologic agent of choice
Atropine .5mg bolus every 3-5 min max at 3mg then dopamine if that doesn’t work
Unstable tachycardia treatment
Immediate synchronized cardioversion
Stable tachycardia treatment
12 lead ekg to assess QRS width, vagal maneuvers
Afib first line pharmacologic option
Beta blocker or Ca2+ channel blocker
Narrow QRS stable tachycardia treatment (excluding wpw)
Adenosine 6mg iv push
Wide QRS stable tachycardia treatment
Amiodarone 150mg
Acute coronary syndrome ACLS steps
- oxygen 94-95%
- IV access
- 12 lead EKG
- 325 mg chewed aspirin unless recent GI bleed or allergy
- Sublingual nitro (unless BP low, which it may be in the situation of RV infarct, or PDE5 use)
- Morphine
- Notify cath lab (if cannot then tPA in 30 min of arrival)
- CXR
- Troponin
Stroke ACLS steps
- Facial droop, arm drift, or slurred speech (cincinnati stroke scale)
- Find last known normal
- Supportive care
- CT
- Perform NIH scale assessmet
- Ischemic qualities and within 3 hours last known normal tPA fibrolytic therapy
- Ischemic qualities and non qualifying then aspirin
If AED says shockable, what 2 rhythms could it be?
Ventricular fib
Pulseless Vtach
If AED says non shockable, what 2 rhythms could it be?
Asystole
PEA
Ventricular fib or pulseless Vtach steps
- administer shock
- CPR 2 min
- shockable?
- If yes cpr 2 min +1 mg epi every 3-5 min IV/IO
Asystole/PEA steps
- CPR 2 min
- 1 mg epi every 3-5 min IV/IO
- shockable?
- If no check for signs of ROSC
You should get an AED if alone with a down adult, but with a kid, you should start ___ first
CPR 2 min
Most common cause of sick sinus syndrome (tachy brady sydnrome)
Sinus node fibrosis
1st degree AV block
Prolonged PR interval, often normal variant asymptomatic in most cases, no treatment needed unless symptomatic then atropine or possibly pacemaker long term
2nd degree AV block Mobitz I
Progressive PR interval lenghtening followed by a dropped QRS (wenckebach), no treatment needed in asymptomatic but can do atropine in symptomatic cases
2nd degree AV block Mobitz II
Constant PR interval with a dropped QRS, often needs treatment because progression to 3rd degree AV block common so permanent pacemaker definitive treatment***
3rd degree AV block
AV dissociation from atrial impulses, requires transcutaneous pacing followed by permanent pacemaker
Treatment of unstable atrial flutter/afib
Direct (synchronized) cardioversion (after TEE to ensure no atrial clots preferrably)
3 novel oral anticoagulants
- rivaroxaban (xarelto)
- dabigatran (pradaxa)
- apixiban (eliquis)
CHA2DS2-VASc criteria
Congestive heart failure Hypertension Age >75 years (2 points) Diabetes Stroke or TIA history (2 points) Vascular disease Age 65-74 Sex (female)
> or = 2 moderate to high risk so chronic oral anticoag recommended
Therapeutic INR goal for warfarin in patients with afib
2-3
PVC definition
Premature beat originating from ventricle causing wide bizarre QRS occurring earlier than expected, common finding on EKG that doesn’t usually warrant treatment unless 3 or > in a row then considered ventricular tachycardi
Torsades de pointes treatment
IV Mag sulfate
Difference between vtach and vfib
V tach still has a pattern while erratic is characteristic of coarse v fib
Long term use adverse effects of aiodarone
Thyroid disorders, pulmonary fibrosis, increased LFTS
Drug used to close a patent ductus arteriosus
IV indomethacin
Drug used to maintain ductus arteriosus and keep it open
Alprostadil
Still murmur
Most common pediatric innocent murmur heard up to preadolesence, cooing like a dove or musical/twanging in nature
Cervical venous hum
2nd most common pediatric innocent murmur behind a stills murmur, most common continuous benign murmur due to turbulent blood flow returning to heart at junction between jugular vein and superior vena cava
How does a patent foramen ovale present?
Often asymptomatic entire life unless causes cryptogenic stroke, treated with surgical PFO closure
Most common type of atrial septal defect
Ostium secundum
Eisenmenger syndrome
Pulmonary hypertension and cyanotic heart disease occurring when a left to right shunt becomes a right to left shunt causing the patient to develop cyanosis and clubbing in lower extremities
Patent ductus arteriosus murmur description
Continuous machine like murmur in the pulmonic area
Physical exam findings of coarctation of aorta
Ankle Brachial index, upper extremitiy hypertension and lower extremity hypotension, delayed or diminished lower extremity pulses
Confirmatory test for coarctation of aorta
Echocardiogram
Study of choice to diagnose tetralogy of fallot
Echocardiogram