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100

What is the classic cardiotoxicity of anthracyclines and its mechanism?

Dilated cardiomyopathy; free radical-mediated oxidative damage to cardiomyocytes โ€” dose-dependent and largely irreversible

100

What shunt direction occurs in an uncorrected VSD and what murmur does it produce?

Left-to-right shunt; harsh holosystolic murmur at left lower sternal border

100

Type A vs Type B aortic dissection โ€” define and first-line management of each?

Type A: involves ascending aorta โ†’ emergent surgery. Type B: descending only โ†’ medical management (beta-blocker, BP control) unless complicated

100

What ECG finding in an athlete is normal and does not require further workup?

Sinus bradycardia, first-degree AV block, early repolarization, incomplete RBBB, voltage criteria for LVH โ€” all training-related normal variants

100

Digoxin toxicity classic ECG finding?

Scooped ST depression ("Salvador Dali" sign) โ€” also bradyarrhythmias, heart block, bidirectional VT in severe toxicity


100

A physician has no federal taxes withheld on 1099 moonlighting income until April โ€” what IRS penalty applies?

Underpayment penalty โ€” quarterly estimated taxes required; safe harbor is paying 100% of prior year tax liability quarterly, otherwise 8% penalty on underpayment amount

200

Trastuzumab cardiotoxicity differs from anthracyclines in what two key ways?

largely reversible with drug discontinuation

not dose-dependent โ€” mechanism is HER2 receptor blockade impairing cardiomyocyte repair rather than direct toxic injury

200

Eisenmenger syndrome โ€” define it and name two absolute contraindications once established?

Reversal of left-to-right to right-to-left shunt due to pulmonary hypertension; contraindications: defect closure (fatal) and pregnancy (maternal mortality up to 50%)

200

What genetic syndrome has hypertelorism, bifid uvula/cleft palate, arterial tortuosity โ€” TGFBR1/2 mutation?

Loeys-Dietz syndrome

200

Athlete's heart vs HCM โ€” what wall thickness is the gray zone where differentiation is difficult?

13โ€“15mm โ€” below this is almost always athlete's heart; above 16mm is almost always pathologic

200

QT prolonging drugs โ€” name the four drug classes most commonly responsible for drug-induced torsades?

antiarrhythmics (sotalol, dofetilide, amiodarone), 

antipsychotics (haloperidol, quetiapine)

antibiotics (azithromycin, fluoroquinolones), 

antiemetics (ondansetron, metoclopramide)

200

What is the self-employment tax rate?

Bonus: what income does it apply to?

15.3%

  • Social Security portion (12.4%) only applies up to the wage base โ€” $176,100 for 2025
  • Medicare (2.9%) applies to all net SE income, no cap
  • An additional 0.9% Medicare surtax kicks in above $200K (single) / $250K (married filing jointly) in combined wages + SE income
300

Fluorouracil cardiotoxicity โ€” mechanism and which patients are highest risk?

Coronary vasospasm causing demand ischemia

highest risk in patients with pre-existing CAD or prior chest radiation โ€” occurs in up to 10% of patients

300

In repaired TOF, what is the most common cause of late sudden death and its substrate?

Ventricular tachycardia via scar-mediated reentry at RVOT surgical scar (ventriculotomy or transannular patch); QRS duration >180ms is the strongest non-invasive risk marker โ€” distinct from overall late mortality which is dominated by RV failure from chronic pulmonary regurgitation

300

Complicated vs uncomplicated Type B dissection โ€” name three complications mandating intervention?

malperfusion (renal, mesenteric, spinal)
rupture or impending rupture
rapid expansion >1cm/year
refractory pain
hypertension despite maximal medical therapy

300

What is the physiologic explanation for athlete's bradycardia and high vagal tone?

Enhanced parasympathetic tone + increased stroke volume from cardiac remodeling โ†’ lower resting HR required to meet cardiac output needs; intrinsic SA node rate also decreases with sustained training

300

Tricyclic antidepressant overdose โ€” mechanism of cardiotoxicity and ECG finding?

Sodium channel blockade โ†’ wide QRS; also alpha blockade (hypotension) and anticholinergic effects (tachycardia); terminal R wave in aVR >3mm predicts arrhythmia risk

300

What is the difference between a revocable and irrevocable trust and why would a high-earning physician choose the latter?

Revocable: you control it, can change it, assets still in your estate for tax purposes. 

Irrevocable: you give up control, assets removed from your taxable estate โ€” used for asset protection from malpractice, Medicaid planning, and reducing estate tax exposure above the $13.6M federal exemption (2024)

400

Per ACC cardio-oncology guidelines, when should cardioprotective therapy be started during anthracycline treatment?

ACE inhibitor/ARB + beta-blocker initiated when EF drops โ‰ฅ10% or GLS declines >15% โ€” some centers start prophylactically in high-risk patients (prior cardiac disease, high cumulative dose.

400

Scimitar syndrome โ€” describe the anatomy and its hemodynamic consequence?

Partial anomalous pulmonary venous return of right lung to IVC โ€” left-to-right shunt; scimitar sign on CXR (curved vessel shadow); associated with right lung hypoplasia and dextroposition of heart


400

Loeys-Dietz syndrome vs Marfan โ€” which has more aggressive aortic disease and why?

Loeys-Dietz โ€” TGFBR1/2 mutation causes more diffuse arterial tortuosity and aneurysms throughout entire arterial tree (not just aorta); dissection occurs at smaller diameters than Marfan; surgical threshold 4.0โ€“4.5 cm vs 4.5โ€“5.0 cm in Marfan; also intracranial aneurysms, cervical spine instability โ€” requires whole-body MRA surveillance annually

400

In exercise-induced hypertension, what is the SBP definition (men and women), and significance?

SBP >210 mmHg in men or >190 mmHg in women at peak exercise โ€” associated with increased risk of future resting hypertension and LVH; consider antihypertensive therapy if exaggerated response with normal resting BP

400

Clozapine cardiac toxicity โ€” what life-threatening complication occurs and when in treatment course?

Myocarditis โ€” occurs in first 4โ€“8 weeks of treatment; also cardiomyopathy with chronic use; monitor troponin and CRP weekly for first month; discontinue immediately if myocarditis suspected

400

Name the two most important disability optional riders and why each matters?

(1) Future increase option (FIO) โ€” locks in ability to increase coverage as attending income grows without new medical underwriting; critical before any health changes occur.
(2) Own-occupation rider โ€” ensures benefit pays if you can't perform subspecialty specifically even if you can still practice general medicine; without it, policy may deny claim if you can see office patients

500

Clonal hematopoiesis of indeterminate potential (CHIP) โ€” why is it relevant to cardio-oncology?

CHIP mutations (TET2, DNMT3A) independently increase cardiovascular risk โ€” accelerate atherosclerosis and heart failure; also increases risk of chemotherapy cardiotoxicity; emerging screening target in cardio-oncology

500

Name four specific long-term complications of Fontan circulation and their mechanisms?

Protein-losing enteropathy (elevated venous pressure โ†’ gut lymphatic leak)
Fontan-associated liver disease (hepatic venous congestion โ†’ fibrosis โ†’ HCC)
plastic bronchitis (lymphatic casts in airways)
atrial arrhythmias (massively dilated atria from chronic high pressure)

500

Ehlers-Danlos Type IV โ€” why is surgical mortality so high and what is the management strategy?

COL3A1 mutation causes Type III collagen deficiency โ€” arterial walls extremely fragile, tear with minimal manipulation; sutures pull through tissue; surgical mortality 5โ€“10x higher than standard aortic surgery;

Management: avoid elective surgery, angiography only if absolutely necessary, conservative management of dissection/rupture when possible โ€” most patients die from spontaneous arterial rupture not amenable to repair

500

Wolff-Parkinson-White in an asymptomatic athlete โ€” when is ablation recommended per current guidelines?

Electrophysiology study recommended to risk-stratify; ablation recommended if SPERRI <250ms or ERP <250ms during EP study โ€” asymptomatic WPW with high-risk EP findings warrants ablation before competitive sport clearance

500

Chloroquine/hydroxychloroquine overdose โ€” ECG findings and how do you treat it? 

Wide QRS, QT prolongation, ventricular arrhythmias โ€” sodium channel blockade similar to TCA; sodium bicarbonate alkalinizes serum, reduces drug-channel binding, narrows QRS; also treat hypokalemia aggressively

500

Explain how S-corp election reduces self-employment tax, the IRS reasonable salary requirement, and the risk of underpaying salary.

S-corp splits income into W2 salary (subject to FICA 15.3%) and distributions (not subject to FICA); IRS requires "reasonable compensation" for services โ€” typically 40โ€“60% of net profit; underpaying salary triggers IRS audit, back FICA taxes, penalties; savings of $10,000-$30,000/year at high income levels if structured correctly

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