Heart Transplantation — MCQs
In orthotopic liver transplantation, which is the best way to achieve bile drainage in the donor liver
Which is given to prevent relapse in multiple sclerosis?
Which of the following diseases is appropriately treated with combined heart-lung transplantation?
Which one of the following is not a wound closure technique?
Most common malignancy in post-transplant individuals:
Which of the following is category 3 in the Maastricht classification of donation after cardiac death?
A 55-year-old male, known smoker, complains of calf pain while walking. He experiences calf pain while walking but can continue walking with effort. Which grade of claudication does this patient fall under?
Which of the following is not a component of the Goldman Revised Cardiac Risk Index?
Dr. Christiaan Barnard performed the 1st heart transplant in the year -
Which of the following statements about heart transplantation is false?
Heart Transplantation Indian Medical PG Practice Questions and MCQs
Question 1: In orthotopic liver transplantation, which is the best way to achieve bile drainage in the donor liver
- A. Donor bile duct with recipient bile duct or Roux-en-Y choledochojejunostomy (Correct Answer)
- B. Donor bile duct with jejunum of recipient
- C. Donor bile duct with duodenum of recipient
- D. External drainage for a few days followed by choledochojejunostomy
Explanation: ***Donor bile duct with recipient bile duct or Roux en Y choledochojejunostomy*** - The most common and preferred method for bile drainage in **orthotopic liver transplantation** is a **duct-to-duct anastomosis** between the donor and recipient bile ducts. - If a primary duct-to-duct anastomosis is not feasible due to size mismatch, damage, or other reasons, a **Roux-en-Y choledochojejunostomy** is performed, which involves connecting the donor bile duct to a Roux limb of the jejunum. *External drainage for few days followed by choledochojejunostomy* - **External bile drainage** is generally avoided in liver transplantation due to increased risks of **infection** and complications like **bile leaks**. - It does not provide a definitive long-term solution for bile flow and necessitates a secondary, more complex surgical procedure for permanent drainage. *Donor bile duct with jejunum of recipient* - Connecting the donor bile duct directly to the jejunum (without a Roux-en-Y limb) would expose the biliary tree to **intestinal contents**, increasing the risk of **ascending cholangitis**. - The Roux-en-Y configuration is crucial to prevent reflux of food and bacteria into the biliary system, which is not achieved by a simple choledochojejunostomy. *Donor bile duct with duodenum of recipient* - Anastomosing the donor bile duct directly to the **duodenum** significantly increases the risk of **reflux of duodenal contents**, including digestive enzymes and bacteria, into the biliary system. - This reflux can lead to severe and recurrent **cholangitis**, stricture formation, and potential graft failure due to chronic inflammation and infection.
Question 2: Which is given to prevent relapse in multiple sclerosis?
- A. Corticosteroids
- B. IFN-gamma
- C. Cyclosporine
- D. IFN-beta (Correct Answer)
Explanation: ***Correct: IFN-beta*** - **Interferon-beta** is a disease-modifying therapy (DMT) commonly prescribed to **reduce the frequency and severity of relapses** and slow disease progression in **relapsing-remitting multiple sclerosis (RRMS)** [1], [2]. - Its mechanism of action involves **modulating the immune system**, reducing inflammation, and preventing immune cells from attacking the myelin sheath in the central nervous system. *Incorrect: Corticosteroids* - **Corticosteroids** (e.g., methylprednisolone) are primarily used for **acute treatment of MS relapses** to shorten their duration and severity, not for long-term relapse prevention [1]. - Their long-term use is limited by significant side effects, making them unsuitable as chronic preventive therapy [1]. *Incorrect: IFN-gamma* - **Interferon-gamma** has been shown to **exacerbate MS symptoms** and increase relapse rates, making it contraindicated in MS treatment. - It promotes a **pro-inflammatory immune response**, which is detrimental in an autoimmune demyelinating disease like MS. *Incorrect: Cyclosporine* - **Cyclosporine** is an immunosuppressant primarily used to prevent **organ transplant rejection** and in some severe autoimmune conditions. - While it has immunomodulatory properties, it is **not a first-line or standard treatment for MS relapse prevention** due to its significant toxicity profile (e.g., nephrotoxicity) and less favorable efficacy compared to approved DMTs.
Question 3: Which of the following diseases is appropriately treated with combined heart-lung transplantation?
- A. End-stage emphysema
- B. Idiopathic dilated cardiomyopathy with long-standing secondary pulmonary hypertension (Correct Answer)
- C. Primary pulmonary hypertension
- D. Cystic fibrosis
Explanation: ***Idiopathic dilated cardiomyopathy with long-standing secondary pulmonary hypertension*** - In cases of severe **idiopathic dilated cardiomyopathy**, the failing left ventricle can lead to **long-standing secondary pulmonary hypertension**. - This persistent high pressure in the pulmonary circulation results in **irreversible damage** to the pulmonary vasculature, creating fixed pulmonary vascular resistance. - When the pulmonary hypertension becomes fixed and irreversible, isolated heart transplantation would fail as the new heart would face the same elevated pressures, necessitating **combined heart-lung transplantation**. *End-stage emphysema* - **End-stage emphysema** primarily affects the lungs, causing destruction of alveolar walls and airflow obstruction. - While a **bilateral lung transplant** is the standard treatment for severe emphysema, the heart is typically not primarily affected to the extent that it would require combined transplantation. *Primary pulmonary hypertension* - **Primary pulmonary hypertension** is a disease of the pulmonary arteries, where blood vessels in the lungs become narrowed, stiff, or destroyed. - In most cases, **bilateral lung transplantation** alone is sufficient, as the new lungs provide healthy pulmonary vasculature. - While combined heart-lung transplantation may be considered in severe cases with established irreversible right ventricular failure, the more definitive indication is when secondary pulmonary hypertension is caused by primary cardiac disease (as in option A). *Cystic fibrosis* - **Cystic fibrosis** is a genetic disorder that predominantly causes severe lung disease due to thick, sticky mucus buildup. - It primarily necessitates a **bilateral lung transplant** to replace the diseased lungs; the heart is generally not directly affected to the point of requiring a combined transplant.
Question 4: Which one of the following is not a wound closure technique?
- A. Composite graft
- B. Vascular graft (Correct Answer)
- C. Partial thickness skin graft
- D. Musculocutaneous flap
Explanation: ***Vascular graft*** - A **vascular graft** is a tube-like structure used to bypass or replace a diseased or damaged blood vessel. - Its primary purpose is to **restore blood flow**, not to close a wound on the body surface or replace missing tissue. *Partial thickness skin graft* - A **partial thickness skin graft** involves transplanting the epidermis and a portion of the dermis to cover a wound. - This is a common and effective technique for **wound closure**, particularly for large surface area wounds or burns. *Composite graft* - A **composite graft** is a graft consisting of multiple tissue types, such as skin, cartilage, and fat, often used for reconstruction. - This is a direct method of **wound closure** and tissue replacement, particularly in areas requiring structural support and soft tissue coverage. *Musculocutaneous flap* - A **musculocutaneous flap** involves the transfer of skin, subcutaneous tissue, and an underlying muscle to cover a wound. - This is a versatile **wound closure technique** that provides robust soft tissue coverage and blood supply to complex defects.
Question 5: Most common malignancy in post-transplant individuals:
- A. Kaposi sarcoma
- B. PTLD
- C. CNS lymphoma
- D. Squamous cell carcinoma of skin (Correct Answer)
Explanation: Most common malignancy in post-transplant individuals: ***Squamous cell carcinoma of skin*** - **Squamous cell carcinoma (SCC) of the skin** is the most common malignancy in post-transplant individuals, largely due to **immunosuppression** which impairs immune surveillance against oncogenic viruses and sunlight-induced mutations [1]. - The risk of SCC is significantly increased (up to 65-fold) in transplant recipients, often presenting as **multiple tumors** and exhibiting a more aggressive course than in the general population [2]. *Kaposi sarcoma* - **Kaposi sarcoma (KS)** is associated with **human herpesvirus 8 (HHV-8)** infection and is more common in transplant recipients compared to the general population, but it is not the *most common* malignancy [1]. - While its incidence is increased, it remains less frequent than skin cancers like SCC. *PTLD* - **Post-transplant lymphoproliferative disorder (PTLD)** is a significant complication of organ transplantation, primarily driven by **Epstein-Barr virus (EBV)** infection in the setting of immunosuppression [1]. - PTLD is a serious malignancy, but its overall incidence is less than that of skin cancers. *CNS lymphoma* - **CNS lymphoma** can occur in post-transplant patients, often linked to **EBV infection** and immunosuppression [1]. - Although it is a severe complication, its incidence is considerably lower than that of skin cancers in this population.
Question 6: Which of the following is category 3 in the Maastricht classification of donation after cardiac death?
- A. Awaiting cardiac arrest (Correct Answer)
- B. Patient found deceased upon arrival
- C. Attempts at resuscitation after cardiac arrest
- D. Cardiac arrest following brain death declaration
Explanation: ***Awaiting cardiac arrest*** - This category denotes patients who are anticipated to have a **cardiac arrest** and are considered for organ donation after the cessation of circulatory function. - These individuals are typically in an **intensive care setting**, where withdrawal of life support is planned, leading to eventual cardiac death. *Patient found deceased upon arrival* - This describes individuals who have suffered **unwitnessed cardiac arrest** and are pronounced dead upon the arrival of medical personnel. - Organ viability for donation is often compromised due to the **unknown downtime** and lack of controlled conditions. *Attempts at resuscitation after cardiac arrest* - This category includes patients for whom **resuscitation efforts** were initiated following cardiac arrest but were ultimately unsuccessful. - Organ donation in this context requires assessment of the impact of resuscitation on **organ perfusion** and viability. *Cardiac arrest following brain death declaration* - This scenario describes donation after **neurological determination of death** (brain death), not cardiac death. - In brain death, the heart may still be beating with full circulatory support, and organ procurement occurs while **circulation is maintained**.
Question 7: A 55-year-old male, known smoker, complains of calf pain while walking. He experiences calf pain while walking but can continue walking with effort. Which grade of claudication does this patient fall under?
- A. Grade I (Mild claudication)
- B. Grade II (Moderate claudication) (Correct Answer)
- C. Grade III (Severe claudication)
- D. Grade IV (Ischemic rest pain)
Explanation: ***Grade II (Moderate claudication)*** - **Grade II claudication** is characterized by **intermittent claudication** where the patient experiences pain while walking but can **continue walking with effort**. - This level of claudication reflects a moderate degree of peripheral arterial disease, where blood flow is sufficiently compromised to cause pain with exertion but not severe enough to force immediate cessation of activity. - The patient in this scenario can continue ambulation despite discomfort, which is the defining feature of this grade. *Grade I (Mild claudication)* - **Grade I claudication** involves discomfort or pain that the patient can **tolerate without significantly altering their gait or pace**. - In this stage, the pain is minimal, and the patient may perceive it as a dull ache or mild fatigue rather than true pain. - Walking can continue without significant effort or limitation. *Grade III (Severe claudication)* - **Grade III claudication** is marked by pain that is **severe enough to stop the patient from walking within a short distance** (typically less than 200 meters). - The pain forces the patient to rest and recover before they can resume walking. - This represents significant functional limitation in daily activities. *Grade IV (Ischemic rest pain)* - **Grade IV**, also known as **critical limb ischemia**, involves **pain even at rest**, especially in the feet or toes, often worsening at night when the limb is elevated. - This stage indicates severe arterial obstruction and is frequently associated with **ulcers, non-healing wounds, or gangrene**. - This represents advanced peripheral arterial disease requiring urgent intervention. **Note:** This grading system is a simplified clinical classification. The standard medical classifications for peripheral arterial disease are the **Fontaine classification** (Stages I-IV) and **Rutherford classification** (Categories 0-6).
Question 8: Which of the following is not a component of the Goldman Revised Cardiac Risk Index?
- A. History of preoperative treatment with insulin
- B. History of preoperative serum creatinine >2.0 mg/dL
- C. Age > 80 yrs (Correct Answer)
- D. History of ischemic heart disease
Explanation: ***Age > 80 yrs*** - **Age** is not a parameter included in the Goldman Revised Cardiac Risk Index for predicting postoperative cardiac complications. - The index focuses on specific medical conditions and surgical risk factors. *History of preoperative treatment with insulin* - This is a component of the **Goldman Revised Cardiac Risk Index**, indicating **insulin-dependent diabetes mellitus**. - Diabetes requiring insulin treatment is a significant risk factor for cardiac complications during surgery. *History of preoperative serum creatinine >2.0 mg/dL* - An elevated **serum creatinine** (>2.0 mg/dL) is a recognized component of the index, reflecting **renal insufficiency**. - **Renal impairment** is associated with increased cardiac risk in the perioperative period. *History of ischemic heart disease* - This is a key component of the Goldman Revised Cardiac Risk Index, as a history of **ischemic heart disease** (e.g., prior myocardial infarction, angina) significantly increases perioperative cardiac risk. - Patients with existing heart disease are more susceptible to cardiac events during and after surgery.
Question 9: Dr. Christiaan Barnard performed the 1st heart transplant in the year -
- A. 1962
- B. 1965
- C. 1969
- D. 1967 (Correct Answer)
Explanation: ***1967*** - Dr. Christiaan Barnard performed the **first human heart transplant** on December 3, 1967, at Groote Schuur Hospital in Cape Town, South Africa. - The recipient, Louis Washkansky, lived for 18 days after the surgery. *1962* - While significant advancements in medicine occurred in 1962, the **first heart transplant** had not yet been performed. - This year saw the approval of the **measles vaccine** and the publication of Rachel Carson's "Silent Spring," but not the seminal heart transplant. *1965* - The year 1965 was a period of continued research and experimentation in organ transplantation, but the **first successful human heart transplant** took place later. - Prior to 1967, xenotransplantation experiments in humans involving animal hearts were attempted, but a human-to-human transplant was still pending. *1969* - By 1969, **several hundred heart transplants** had already been performed worldwide following Barnard's pioneering surgery. - Dr. Denton Cooley performed the **first implantation of a total artificial heart** in a human in 1969, indicating that heart transplantation was already established.
Question 10: Which of the following statements about heart transplantation is false?
- A. High pulmonary arterial resistance is a contraindication
- B. It is only orthotopic and not heterotopic (Correct Answer)
- C. Immunosuppression is started preoperatively
- D. A beating heart cadaver/donor is not always needed.
Explanation: ***It is only orthotopic and not heterotopic*** - This statement is **FALSE**, making it the correct answer to this question asking for the false statement. - While **orthotopic transplantation** (replacing the recipient's heart with the donor heart in its normal anatomical position) is the overwhelmingly predominant method, **heterotopic transplantation** (leaving the recipient's heart in place and implanting the donor heart as an auxiliary "piggyback" pump) has been performed as an alternative technique. - Heterotopic transplantation, though rarely used in modern practice, was described and performed in select cases, particularly when the donor heart is undersized or when severe pulmonary hypertension is present. Therefore, the claim that heart transplantation is "only orthotopic" is incorrect. *Immunosuppression is started preoperatively* - This statement is **TRUE**. - **Immunosuppressive therapy** is typically initiated intraoperatively or in some protocols may begin preoperatively to prevent hyperacute and acute rejection. - Induction immunosuppression aims to suppress the recipient's immune response before it can react to the transplanted organ, improving early graft survival. *High pulmonary arterial resistance is a contraindication* - This statement is **TRUE**. - **Fixed pulmonary hypertension** with elevated pulmonary vascular resistance (PVR >4-5 Wood units or transpulmonary gradient >15 mmHg unresponsive to vasodilators) is a **contraindication** for isolated heart transplantation. - The donor right ventricle may not be able to pump against high pulmonary pressures, leading to acute right heart failure. - Such patients may require combined heart-lung transplantation or medical optimization to reduce pulmonary vascular resistance before transplantation can be considered. *A beating heart cadaver/donor is not always needed* - This statement is considered **TRUE**, though with important caveats. - Traditionally, heart transplantation has relied almost exclusively on **beating-heart donors** (brain-dead donors with maintained cardiac function) to ensure organ viability. - The statement acknowledges that in rare circumstances or with advanced preservation techniques, the absolute requirement for a beating heart might be questioned, though in practical terms beating-heart donation remains the standard for heart transplantation.
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