Cardiovascular System

A male patient, aged $55$, arrives at the acute care clinic complaining of worsening shortness of breath and chest discomfort over the past two days. He recently recovered from a severe viral respiratory infection. He describes the chest pain as sharp and states that it lessens significantly when he sits up and leans forward. Within the last two hours, he has felt increasingly dizzy. Vital signs show a temperature of $37.8^\circ\text{C}$ ($100.0^\circ\text{F}$), a blood pressure of $88/72$ mm Hg, a heart rate of $118$/min, and a respiratory rate of $22$/min. Physical examination reveals prominent distention of the neck veins and heart sounds that are noticeably faint on auscultation. An exaggerated drop in systolic blood pressure during inspiration is observed. Arrange the following management steps in the most appropriate chronological sequence for this patient.

Match the following specific cardiovascular physical examination findings with their most likely underlying structural or pathophysiological etiology.

A team of internal medicine residents is reviewing the post-infarction clinical course of several patients admitted to the cardiac intensive care unit. Match each described clinical presentation with the most likely underlying mechanical or structural complication of acute myocardial infarction.

Match each patient's clinical presentation with the most likely corresponding auscultatory finding and its characteristic response to dynamic maneuvers.

Paramedics arrive at the emergency department with an $80$-year-old male who developed sudden, severe shortness of breath one hour ago while watching television. The patient has a medical history significant for poorly controlled hypertension, type 2 diabetes mellitus, and a $45$-pack-year history of smoking. Upon arrival, he is in acute respiratory distress, utilizing accessory muscles to breathe, and cannot speak more than a few words at a time. Vital signs include a blood pressure of $225/115 \text{ mm Hg}$, a heart rate of $115/\text{min}$, and a respiratory rate of $30/\text{min}$. Oxygen saturation is $86\%$ on ambient air. Physical examination shows profound diaphoresis. Pulmonary auscultation reveals prominent expiratory wheezing diffusely, along with fine crackles at both lung bases. Cardiovascular examination is notable for a rapid, regular rhythm and a distinct fourth heart sound (S4). Evaluation of the neck shows flat jugular veins, and there is no peripheral edema. Which of the following is the most appropriate initial pharmacologic therapy for this patient?

Emergency medical personnel transport a $61$-year-old male to the hospital shortly after he experienced the sudden onset of severe, crushing retrosternal chest pain. The pain began while he was resting and is accompanied by profound diaphoresis. His medical history includes type 2 diabetes mellitus, hyperlipidemia, and a $35$ pack-year smoking history. Upon arrival, he appears pale and lethargic. Vital signs demonstrate a blood pressure of $84/52$ mmHg and a heart rate of $56$/min. Physical examination reveals prominent distention of the jugular veins when the patient is positioned at a $45^\circ$ angle. Auscultation of the chest demonstrates completely clear lung fields bilaterally. Cardiac auscultation reveals bradycardia but no murmurs, rubs, or gallops. An electrocardiogram is rapidly obtained and shows $3$-mm ST-segment elevations in leads II, III, and aVF, along with reciprocal ST-segment depressions in leads I and aVL. Which of the following is the most appropriate initial intervention to address this patient's hemodynamic state?

A ward nurse urgently requests an evaluation of a 71-year-old male who developed severe, sudden-onset shortness of breath 20 minutes ago. The patient is currently on postoperative day 3 following an elective sigmoid resection for recurrent diverticulitis. His medical history is significant for ischemic heart disease, diet-controlled type 2 diabetes mellitus, and a 40-pack-year smoking history. Over the past 24 hours, he received 3 liters of intravenous lactated Ringer's solution for transient oliguria.

Vital signs are:
- Temperature: 37.2°C (99.0°F)
- Blood pressure: 168/94 mm Hg
- Pulse: 112/min
- Respirations: 26/min
- Oxygen saturation: 87% on room air

Physical examination reveals an agitated, diaphoretic man sitting upright and using accessory muscles of respiration. The jugular veins are distended to the angle of the mandible when the patient is seated at a 45-degree angle. Cardiac auscultation reveals a regular tachycardia with a distinct, low-pitched additional heart sound heard in early diastole. Lung auscultation demonstrates prolonged expiration with diffuse polyphonic wheezing and bilateral moist crackles in the lower lung fields.

Arterial blood gas analysis on room air shows:
- pH: $7.28$
- pCO $_2$: $54$ mm Hg
- pO $_2$: $56$ mm Hg
- HCO $_3^-$: $24$ mEq/L

Which of the following is the most appropriate initial management for this patient?

A 55-year-old man presents to a rural emergency department reporting severe, crushing, substernal chest pain of 45 minutes duration that radiates to his left jaw. He appears diaphoretic and dyspneic. His blood pressure is 145/90 mm Hg and heart rate is 92/min. A 12-lead electrocardiogram demonstrates 4 mm ST-segment elevations in leads V2 through V5. The facility does not have a cardiac catheterization laboratory. The nearest percutaneous coronary intervention (PCI)-capable center is located 140 minutes away by helicopter transport, and weather conditions are clear for flying. Arrange the following management steps in the most appropriate chronological sequence for this patient.

A 31-year-old G1P0 woman at 38 weeks gestation presents for an urgent evaluation due to severe, worsening shortness of breath over the past week. She reports that her breathing is particularly difficult at night, requiring her to sleep in a recliner chair. She also notes a persistent, dry cough and significant swelling in her legs. She has no significant past medical history, and her pregnancy has been uncomplicated thus far. Her blood pressure is 112/74 mm Hg, pulse is 116/min, and respirations are 24/min. Pulse oximetry shows 92% on ambient air. Physical examination reveals prominent jugular venous distension while sitting at a 45-degree angle. Cardiac auscultation demonstrates a regular tachycardia with a low-pitched, early diastolic sound at the cardiac apex. Lung auscultation reveals crackles in bilateral lung bases. There is 2+ pitting edema in both lower extremities extending to the knees. Which of the following is the most appropriate next step in evaluation?

Match each characteristic electrocardiogram (ECG) finding with its most likely underlying clinical condition or pathology.

During a winter evening shift in the emergency department, a 68-year-old retired teacher arrives complaining of progressively worsening breathlessness over the last 48 hours. She has a history of tobacco use (40 pack-years) and essential hypertension. The patient notes a persistent cough that worsens significantly when she attempts to sleep flat. Vital signs show a temperature of 37.1°C (98.8°F), blood pressure of 162/95 mmHg, pulse of 108/min, and respirations of 26/min. Pulse oximetry reveals an oxygen saturation of 89% on room air. Physical examination demonstrates an elevated jugular venous pressure of 10 cm H2O above the sternal angle. Auscultation of the chest reveals diffuse, high-pitched expiratory wheezing throughout all lung fields without focal crackles. Cardiac auscultation shows a regular tachycardia with an audible third heart sound (S3) at the apex. Trace bilateral pitting edema is present at the ankles. Which of the following is the most appropriate initial pharmacotherapy for this patient's current condition?

A female patient, aged $68$, presents to the acute care clinic accompanied by her family. She reports progressive abdominal swelling, nausea, vomiting, and exertional shortness of breath over the past $14$ days. Her medical history is notable for asthma, primary hypothyroidism, and Hodgkin lymphoma that was treated with mantle field radiation therapy $25$ years ago. Her home medications include levothyroxine and as-needed albuterol.

Her temperature is $37.1^\circ\text{C}$ ($98.8^\circ\text{F}$), blood pressure is $98/60\text{ mmHg}$, pulse is $108\text{/min}$, and respirations are $24\text{/min}$. Pulse oximetry is $94\%$ on room air.

Physical examination reveals a chronically ill-appearing woman. The jugular veins are distended to $14\text{ cm } H_2O$, and the distension increases with inspiration. Chest auscultation reveals diminished breath sounds at the bases bilaterally, with no wheezes or crackles. Cardiac examination shows a rapid, regular rhythm with a sharp, early diastolic sound heard best at the left sternal border. The abdomen is markedly distended and tympanitic, with sluggish bowel sounds and shifting dullness. There is $3+$ pitting edema of the lower extremities bilaterally.

Laboratory studies are as follows:

An upright abdominal radiograph shows multiple dilated loops of small bowel with air-fluid levels. Electrocardiography reveals sinus tachycardia with low-voltage QRS complexes.

Which of the following is the most appropriate next step in the management of this patient?

A $32$-year-old primigravid woman at $36$ weeks gestation comes to the emergency department due to a one-week history of progressively worsening shortness of breath. She reports having to sleep propped up on three pillows and frequently waking up at night with a dry cough. Her medical history is notable for mild asthma during childhood and a $10$-pack-year smoking history, though she quit smoking upon becoming pregnant. Her temperature is $37.1^\circ\text{C}$ ($98.8^\circ\text{F}$), blood pressure is $112/76$ mm Hg, pulse is $114$/min, and respirations are $24$/min. Pulse oximetry shows $92\%$ on room air. Physical examination reveals distended neck veins with a jugular venous pressure of $11$ cm H $_2$ O. Cardiac auscultation demonstrates a regular tachycardia with a distinct third heart sound (S $_3$) gallop. Pulmonary examination shows fine crackles at the lung bases bilaterally. There is $2+$ pitting edema extending to the mid-calves. An arterial blood gas analysis on room air shows a pH of $7.47$, pCO $_2$ of $29$ mm Hg, and pO $_2$ of $64$ mm Hg. Which of the following is the most appropriate next step in the management of this patient?

Jugular venous pulse (JVP) analysis provides critical insights into right-sided heart hemodynamics and can distinguish between several life-threatening and chronic cardiovascular pathologies. Match each of the following abnormal JVP waveform findings with the specific clinical condition it most classically represents.

Match each cardiovascular condition with its characteristic hemodynamic profile obtained during right heart catheterization.

A 68-year-old man presents to the outpatient clinic reporting a three-week history of worsening swelling in his lower extremities and an uncomfortable sensation of abdominal fullness. He has a 45-pack-year smoking history and was diagnosed with severe chronic obstructive pulmonary disease (COPD) five years ago, for which he takes inhaled bronchodilators and corticosteroids. Vital signs show a blood pressure of 118/76 mmHg, a heart rate of 88/min, and an oxygen saturation of 89% on room air. Physical examination reveals prominent jugular venous distention and a palpable parasternal heave. Auscultation of the chest demonstrates distant breath sounds with a prolonged expiratory phase, but no crackles are heard. A holosystolic murmur is auscultated at the lower left sternal border that increases in intensity with inspiration. Tender hepatomegaly is noted on abdominal palpation. Which of the following pathophysiologic mechanisms is the most direct cause of this patient's cardiovascular findings?

A 42-year-old man presents to the emergency department with sharp, pleuritic chest pain and worsening dyspnea 10 days after a presumed viral upper respiratory infection. While in the emergency department, he suddenly becomes lightheaded. His blood pressure drops to 85/50 mm Hg, and his pulse increases to 115/min. Physical examination reveals distended jugular veins and distant, muffled heart sounds. Bedside echocardiography confirms a large pericardial effusion. Arrange the following pathophysiological events in the chronological order they occur during the development of this patient's acute hemodynamic compromise.

Match each jugular venous pulse (JVP) waveform abnormality with the cardiac pathology it most specifically represents.

A 48-year-old man is evaluated in the hospital for new-onset chest discomfort and lightheadedness. He was admitted 5 days ago for methicillin-susceptible *Staphylococcus aureus* (MSSA) bacteremia and suspected infective endocarditis. He has a history of intravenous drug use. A transthoracic echocardiogram on admission showed a 1.2-cm vegetation on the right coronary cusp of the aortic valve with mild aortic regurgitation. He was started on targeted therapy with intravenous oxacillin. Today, he reports feeling weak and dizzy when sitting up in bed, along with a vague, substernal tightness. His temperature is 38.4°C (101.1°F), blood pressure is 102/60 mm Hg, and pulse is 58/min. Physical examination reveals an early diastolic decrescendo murmur at the left sternal border. The lungs have fine bibasilar crackles. An electrocardiogram is obtained which shows a sinus rhythm with a PR interval of 0.28 seconds and a new left bundle branch block. Which of the following is the most appropriate next step in management?

A 71-year-old retired teacher with a significant smoking history and essential hypertension is evaluated in the emergency department for worsening respiratory distress over the past 48 hours. She describes a sensation of 'drowning' when she tries to sleep and has resorted to sitting upright in a chair overnight. She has a cough producing frothy sputum. Current medications include lisinopril and hydrochlorothiazide. Her temperature is 37.0°C (98.6°F), blood pressure is 172/98 mmHg, pulse is 112/min, and respiratory rate is 26/min. Oxygen saturation is 88% on room air. Physical examination reveals prominent jugular veins when sitting at a 45-degree angle. Lung auscultation yields diffuse expiratory wheezing and prominent crackles in the lower lung fields bilaterally. Cardiac examination reveals a regular tachycardia with a distinct third heart sound (S3). A chest radiograph demonstrates bilateral interstitial infiltrates, prominent superior pulmonary vessels, and an enlarged cardiac silhouette. Which of the following is the most appropriate initial pharmacotherapy for this patient?