Cardiology 16% Flashcards
Reduced contraction strength, large heart, systolic dysfunction
Dilated Cardiomyopathy
Dilated cardiomyopathy etiology
Genetics, excess alcohol, postpartum, chemotherapy, endocrine disorders
Dilated Cardiomyopathy physical exam
Dyspnea, S3 gallop, rales, jugular venous distention
Hypertrophic portion of septum - Young athlete with a positive family history has sudden death or syncopal episode
Hypertrophic Cardiomyopathy
Hypertrophic Cardiomyopathy physical exam
High pitched mid systolic murmur at LLSB. Increased with valsalva and standing (less blood in chamber). Decreased with squatting (more blood in chamber).
Right heart failure with a history of infiltrative process - stiff ventricles
Restrictive Cardiomyopathy
Restrictive cardiomyopathy etiologies
Amyloidosis, sarcoidosis, hemochromatosis, scleroderma, fibrosis, and cancer
Low-amplitude fibrillatory waves without discrete P waves and an irregularly irregular pattern of QRS complexes
Atrial fibrillation
Regular, sawtooth pattern, atrial rate 250-350 BPM, narrow QRS complex
Atrial flutter
PR interval > .2 seconds.
Actually a delay rather than a block.
First degree AV block
First degree AV block caused by a ______
conduction delay at the AV node or bundle of His.
This means that the PR Interval will be longer than normal (over 0.20 sec.).
Second degree AV block Types
Second degree AV block Type 1 (Wenckebach) and Type 2 (Mobitz)
Describe Second degree AV block Type 1 (Wenckebach)
Longer, longer, drop now you’ve got a Wenckebach.
With second-degree heart block, Type I, some impulses are blocked but not all. More P waves can be observed vs QRS Complexes on a tracing. Each successive impulse undergoes a longer delay. After 3 or 4 beats the next impulse is blocked.
Describe Second degree AV block Type 2 (Mobitz)
Some get dropped some get through now you’ve got Mobitz 2.
With Mobitz Type II blocks, the impulse is blocked in the bundle of His. Every few beats there will be a missing beat but the PR Interval will not lengthen.
With this block, no atrial impulses are transmitted to the ventricles.
Third degree AV block
Describe Third degree AV block
The ventricles generate an escape impulse, which is independent of the atrial beat. In most cases, the atria will beat at 60-100 bpm while the ventricles asynchronously beat at 30-45 bpm.
R and R’ (upward bunny ears) in V4-V6
Left bundle branch block
R and R’ (upward bunny ears) in V1-V3
Right bundle branch block
SVT with abrupt onset and offset
Paroxysmal supraventricular tachycardia
Any tachydysrhythmia arising from above the level of the Bundle of His
Atrioventricular nodal reentrant tachycardia (AVNRT):
Caused by the presence of an abnormal accessory electrical conduction pathway between the atria and the ventricles (Bundle of Kent fibers).
PWolff-Parkinson-White (WPW) syndrome
Wolff-Parkinson-White (WPW) syndrome on EKG
Shortened PR interval, widened QRS, and delta waves
Premature beats
PVC, PAC, PJC
Early wide “bizarre” QRS, no p wave seen
PVC
Abnormally shaped P wave
PAC
The QRS complex will be narrow, usually measured at 0.10 sec or less, no p wave or inverted p wave
PJC
Collective term used to describe dysfunction in the sinus node’s automaticity and impulse generation
Sick sinus syndrome
Sinus bradycardia
Sinus rhythm with a resting heart rate of < 60 bpm in adults, or below the normal range for age in children
Sinus pause
pause < 3 seconds
Sinus arrest
pause > 3 seconds
Tachy-Brady Syndrome
Episodes of alternating sinus tachycardia and bradycardia
Wide complex tachycardia with three or more consecutive premature ventricular beats
Ventricular tachycardia
Stable ventricular tachycardia treatment
Amiodarone → lidocaine → procainamide (in this order)
Unstable ventricular tachycardia treatment
CPR and defibrillation (synchronized direct current (DC) cardioversion)
EKG: No discernible heart contractions
Ventricular fibrillation
Ventricular fibrillation treatment
CPR and defibrillation (AKA non-synchronized cardioversion)
Polymorphic ventricular tachycardia that appears to be twisting around a baseline
Torsades de pointes
Torsades de pointes treatment
Magnesium sulfate
Foramen ovale fails to close
Atrial septal defect
Atrial septal defect findings
Noncyanotic.
Wide fixed split second heart sound (S2). Systolic ejection murmur at second left intercostal space with an early to mid-systolic rumble.
Coarctation of the aorta findings
Noncyanotic
Higher blood pressures in the arms than in the legs and pulses are bounding in the arms but decreased in the legs.
Patent ductus arteriosus findings
Noncyanotic
A continuous “machinery murmur” at the upper left sternal border
Tetralogy of Fallot findings
Cyanotic
Four features “PROVe”: Pulmonary stenosis, Right ventricular hypertrophy, Overriding aorta, Ventricular septal defect
The most common pathologic murmur in childhood.
Ventricular septal defect
Ventricular septal defect findings; treatment
Noncyanotic .
Loud, harsh, pansystolic murmur at the lower left sternal border.
Most close by age 6, surgery if large.
Heart failure types
Right sided
Left sided: Systolic; Diastolic
Right sided heart failure findings
Peripheral and abdominal fluid accumulation = jugular venous distention, edema, hepatomegaly, no rales.
Diagnose with echo and doppler, gold standard is right heart cardiac catheterization
Right sided heart failure diagnostics
Echo and doppler U/S.
Gold standard is right heart cardiac catheterization
Left sided heart failure findings
Shortness of breath and fatigue - paroxysmal nocturnal dyspnea, cough, orthopnea, rales
Systolic heart failure findings
Decreased ejection fraction, S3 (rapid ventricular filling during early diastole is the mechanism responsible for the S3)
Diastolic heart failure findings
Ejection fraction is usually normal, S4