During a routine cardiac catheterization, a physician enters the coronary sinus. Which chamber’s wall is this vessel located within?

A patient suffers a stab wound just to the left of the sternum at the 4th intercostal space. Which structure is most likely to be penetrated first?

A 24-year-old athlete dies suddenly during a game. Autopsy reveals hypertrophic cardiomyopathy. In this condition, the outflow obstruction typically occurs between the interventricular septum and which valve leaflet?

A surgeon is performing a repair on a ventricular septal defect (VSD). To avoid damaging the conduction system, they must be careful near the inferior-posterior border of the membranous septum. Which structure is at highest risk here?

A patient presents with an ST-elevation MI in leads II, III, and aVF. An angiogram shows 100% occlusion of the artery that supplies the AV node. In 85% of the population, this artery arises from which of the following?

A 68-year-old woman is diagnosed with an occlusion in the artery that runs in the anterior interventricular groove. Which area of the heart is most likely affected?

During a CABG procedure, the surgeon identifies the "crux" of the heart. This is the junction where the posterior interventricular artery usually originates. Which vein travels alongside this artery?

A patient is found to have a "left-dominant" heart. This means the posterior descending artery (PDA) arises from which vessel?

An occlusion of the proximal Right Coronary Artery (RCA) before the marginal branch would most likely result in ischemia to which of the following?

A newborn is noted to be cyanotic. Echocardiogram shows that the aorta is connected to the right ventricle and the pulmonary artery is connected to the left ventricle. This defect is caused by a failure of which process?

A 4-year-old child is found to have a "machine-like" murmur. The structure involved is a remnant of which embryological aortic arch?

In the developing heart, the smooth part of the right atrium (sinus venarum) is derived from which of the following?

A patient is diagnosed with Tetralogy of Fallot. Which of the following embryological events is the primary cause of this constellation of defects?

The "ligamentum arteriosum" is the postnatal remnant of the ductus arteriosus. During fetal life, what is the primary function of the ductus arteriosus?

On a posterior-anterior (PA) chest X-ray, which of the following structures forms the right heart border?

A transesophageal echocardiogram (TEE) probe is placed in the esophagus. Which cardiac structure is closest to the probe and is best visualized through the esophageal wall?

A 55-year-old male undergoes a CT scan of the chest. The radiologist identifies a vessel located immediately posterior to the sternum and anterior to the trachea. Which vessel is this?

During a pericardiocentesis, a needle is inserted at the left infrasteral angle. Which of the following layers must the needle pass through last before entering the pericardial space?

A patient with long-standing mitral stenosis develops hoarseness (Ortner syndrome). This is caused by the left atrium compressing which nerve against the arch of the aorta?

In a "right-dominant" heart, which vessel provides the blood supply to the posteromedial papillary muscle of the mitral valve?

A 60-year-old man presents with an acute MI. Leads V3 and V4 show ST-segment elevation. Which specific area of the heart is most likely infarcted?

During an autopsy, the "moderator band" is identified. In which chamber is this structure found?

The "crista terminalis" is a landmark in the right atrium. It represents the junction between which two embryological structures?

A patient has a thrombus in the "left atrial appendage." This structure is a remnant of which embryological component?

A 1-day-old infant has a heart murmur. Imaging shows the left and right ventricles are connected by a defect in the membranous portion of the septum. This is most likely due to a failure of which of the following?

A patient is born with a "Persistent Truncus Arteriosus." This condition is specifically associated with a failure of which cell type?

An 18-year-old female is found to have a "bicuspid aortic valve." Which of the following is she at highest risk for later in life?

During development, the 4th aortic arch on the left side contributes to which adult structure?

Which embryological structure gives rise to the smooth part of the left and right ventricles (outflow tracts)?

A neonate presents with coarctation of the aorta (pre-ductal type). This is often associated with which chromosomal abnormality?

The "foramen ovale" allows blood to bypass the lungs in the fetus. What causes it to close functionally at birth?

Failure of the "septum primum" and "septum secundum" to fuse results in which of the following?

A CT scan shows the left renal vein being compressed between the aorta and the superior mesenteric artery (Nutcracker syndrome). In the heart, which vessel is similarly compressed between the aorta and the pulmonary artery in "transposition"?

The "ductus venosus" shunts blood from the umbilical vein to the IVC. What is its adult remnant?

A patient presents with a "Right Bundle Branch Block." Which vessel's occlusion is most likely responsible for this finding?

A 75-year-old male with atrial fibrillation is at risk for emboli. Most emboli originating in the heart form in the left atrial appendage. Which nerve is most likely to be injured during a surgical excision of this appendage?

The "SA Node" is typically located at the junction of the superior vena cava and the...

If the "Third Aortic Arch" fails to develop properly, which of the following would be absent?

In a patient with "Total Anomalous Pulmonary Venous Return" (TAPVR), the pulmonary veins typically drain into the...

The "valvula foraminis ovalis" is formed by which fetal structure?

Which heart valve has only two cusps/leaflets?

A patient has a pericardial effusion causing "Cardiac Tamponade." The fluid accumulates between which two layers?

The "Small Cardiac Vein" runs alongside which artery?

Which of the following is derived from the "Truncus Arteriosus"?

A patient with "Dextrocardia" has a heart that points to the right. This is due to a defect in which process?

Which artery supplies the "Anterolateral Papillary Muscle"?

In "Tetralogy of Fallot," the overriding aorta sits over which defect?

The "Oblique Sinus" of the pericardium is located...

Which vessel is the first branch of the Arch of the Aorta?

A 64-year-old male with a history of poorly controlled hypertension and smoking presents to the emergency department with sudden-onset, "tearing" chest pain that radiates to his back. His blood pressure is 180/100 mmHg in the right arm and 140/90 mmHg in the left arm. A CT angiogram confirms a dissection of the descending aorta. This pathology most likely originated just distal to the origin of which embryological derivative?

A 2-week-old infant is brought to the pediatrician due to poor feeding and "sweating" during nursing. On exam, a harsh holosystolic murmur is heard at the left lower sternal border. Echocardiography reveals a defect in the membranous portion of the interventricular septum. During normal development, which of the following structures must fuse with the muscular interventricular septum and the bulbar ridges to form this part of the heart?

A 45-year-old female undergoes a cardiac procedure to ablate an ectopic focus causing supraventricular tachycardia. The electrophysiologist identifies the focus near the opening of the coronary sinus in the right atrium. To reach this area from the femoral vein, the catheter must pass through the tricuspid valve and then navigate toward the "Triangle of Koch." Which of the following forms the superior border of this triangle?

A 58-year-old man presents with an acute MI. Electrocardiogram shows ST-elevation in leads V1–V4. On day 4 of hospitalization, he suddenly develops a new, loud holosystolic murmur heard best at the left sternal border and rapidly progresses into cardiogenic shock. This complication is most likely due to a rupture in a structure supplied by which artery?

A 72-year-old male is undergoing an emergency repair of an abdominal aortic aneurysm. During the procedure, the surgeon accidentally ligates the "Artery of Adamkiewicz." The patient is at high risk for ischemia of the spinal cord. In the heart, a similar "end-artery" vulnerability is seen in the posteromedial papillary muscle. Why is this muscle more prone to rupture than the anterolateral papillary muscle?

A 28-year-old pregnant woman at 32 weeks gestation undergoes a fetal ultrasound. The sonographer identifies a vessel that connects the left portal vein to the inferior vena cava, allowing oxygenated blood to bypass the hepatic circulation. Which of the following is the postnatal remnant of this fetal structure?

A 6-year-old boy is brought to the clinic for a routine check-up. The physician notes a wide, fixed splitting of the second heart sound (S2). The patient is scheduled for a repair of a secundum-type atrial septal defect. This defect results from an anomaly in which of the following?

A 50-year-old male presents with stable angina. Stress testing shows reversible ischemia in the lateral wall of the left ventricle. During coronary angiography, the physician notes that the patient has a "left-dominant" circulation. Which vessel is the most likely source of the ischemia?

A 3-day-old neonate with DiGeorge syndrome (22q11 deletion) is noted to have persistent cyanosis. Imaging shows a single great vessel exiting the heart that receives blood from both ventricles. This condition is caused by a failure of the truncus arteriosus to divide. Which of the following processes was interrupted?

A 67-year-old woman is found to have a mass in the upper lobe of her left lung. She also complains of a "droopy" left eyelid and a small left pupil. In addition to these symptoms, she has a hoarse voice. The hoarseness is most likely due to the mass compressing a nerve as it loops under which of the following?

A 19-year-old college student collapses during a basketball game. He is found to have a massive pericardial effusion. If the physician performs a pericardiocentesis via the subxiphoid approach, which of the following layers will the needle penetrate first after the skin and fascia?

During a dissection of a cadaver, a medical student identifies a structure in the right atrium that is a remnant of the fetal valve of the inferior vena cava. What is this structure called?

A patient presents with a mid-systolic click followed by a late systolic murmur. Echocardiography confirms mitral valve prolapse. This condition is often associated with connective tissue disorders. The mitral valve is situated between which two chambers?

A 5-year-old girl is found to have a "boot-shaped" heart on chest X-ray. She often squats to relieve "blue spells." Which of the following is an embryological component of her condition?

A 40-year-old man is stabbed in the chest. The knife enters the 5th left intercostal space, midclavicular line. Which structure is most likely to be injured?

A 55-year-old woman with a history of breast cancer undergoes a CT chest for follow-up. The radiologist notes that the "left atrium" is the most posterior chamber of the heart. Enlargement of this chamber is most likely to cause which of the following clinical findings?

A patient is diagnosed with "Coarctation of the Aorta" (adult type). He has hypertension in the upper extremities and weak femoral pulses. On X-ray, "rib notching" is seen. This notching is caused by the enlargement of which vessels?

In the fetal circulation, blood with the highest oxygen saturation is found in which of the following?

The SA node and AV node are most commonly supplied by branches of the Right Coronary Artery. In a patient with an RCA occlusion, which of the following EKG findings would be most expected?

A 22-year-old male is found to have a "sinus venosus" type Atrial Septal Defect. This defect is located high in the atrial septum, near the entry of the...

Which of the following aortic arches gives rise to the proximal part of the right subclavian artery?

A patient with a history of IV drug use presents with endocarditis. The tricuspid valve is involved. This valve is located between which two chambers?

During a cardiac surgery, the surgeon identifies the "Transverse Pericardial Sinus." This space allows the surgeon to pass a finger behind which two major vessels?

A patient has a defect in the "Aorticopulmonary Septum." Which of the following conditions would NOT be expected?

The "Ligamentum Teres Hepatis" is a remnant of which fetal structure?

A 30-year-old female presents with chest pain that is relieved by leaning forward. A friction rub is heard on auscultation. Which of the following is the most likely diagnosis?

The "Great Cardiac Vein" travels in the anterior interventricular groove. Which artery does it accompany?

A patient is found to have "Situs Inversus." In this condition, the heart is located on the right side of the chest. This is often associated with a defect in which of the following?

Which of the following structures is responsible for the "S1" heart sound?

A 10-year-old child with a history of a "cyanotic heart defect" underwent surgery years ago. Now, he presents with clubbing of the fingers and a hematocrit of 60%. This compensatory polycythemia is a response to chronic...