The cardiac ICU nurse is assessing a patient who is in cardiogenic shock. Which hemodynamic manifestations and/or signs and symptoms do the nurse expect? Select all that apply.
Narrowed pulse pressure.
Tachycardia.
Elevated SBP.
Pulmonary congestion.
Pulmonary artery wedge pressure
Correct Answer : A,B,D,E
A. Narrowed pulse pressure: In cardiogenic shock, the cardiac output is compromised, resulting in reduced stroke volume and subsequent narrowed pulse pressure. The pulse pressure is the difference between systolic and diastolic blood pressure.
B. Tachycardia: Tachycardia is a compensatory response in cardiogenic shock, as the body attempts to increase cardiac output to maintain tissue perfusion despite decreased stroke volume. Increased heart rate is a common finding in this condition.
D. Pulmonary congestion: Cardiogenic shock is often associated with impaired left ventricular function, leading to an inadequate pump mechanism. This can result in fluid accumulation and congestion in the pulmonary circulation, leading to pulmonary edema and congestion. Patients may experience symptoms such as dyspnea, crackles on lung auscultation, and increased work of breathing.
E. Elevated pulmonary artery wedge pressure (PAWP): PAWP is a measurement obtained during invasive hemodynamic monitoring. In cardiogenic shock, the impaired left ventricular function leads to increased left atrial pressure, which is reflected by an elevated PAWP. Elevated PAWP indicates increased fluid volume and congestion in the left side of the heart.
C. Elevated SBP in (option C) is incorrect because Elevated systolic blood pressure (SBP) is not a typical finding in cardiogenic shock. Instead, hypotension or decreased blood pressure is commonly observed due to reduced cardiac output.
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Related Questions
Correct Answer is ["A","B","C","D"]
Explanation
These conditions can lead to fluid loss, either through increased gastrointestinal output (diarrhea, vomiting, lower GI bleeding) or accumulation of air in the pleural space (tension pneumothorax), resulting in a decrease in blood volume and subsequent hypovolemic shock.
E. Diabetes insipidus in (option E) is incorrect because it is not directly associated with hypovolemic shock. Diabetes insipidus is a condition characterized by excessive thirst and the production of large volumes of dilute urine due to insufficient production or response to antidiuretic hormone (ADH). While diabetes insipidus can lead to dehydration and potential hypovolemia, it is not a direct cause of hypovolemic shock.
F. Valvular stenosis in (option F) is incorrect because it is a condition characterized by the narrowing or obstruction of one or more heart valves. While it can cause problems with cardiac output and circulation, it is not specifically related to hypovolemic shock, which is caused by a decrease in blood volume.
Therefore, the conditions that can cause hypovolemic shock include diarrhea, vomiting, lower GI bleeding, and tension pneumothorax.
Correct Answer is A
Explanation
The QTc (corrected QT) interval is a measure of the time it takes for the ventricles to depolarize and repolarize during a cardiac cycle. It is corrected for heart rate (HR) to account for variations in the cardiac cycle length.
The normal range for the QTc interval varies depending on the calculation method used but generally falls within 0.36 to 0.44 seconds. In the given options, the range of 0.33 to 0.47 seconds for the QTc interval is wider than the normal range, suggesting a prolonged QTc interval, which can be indicative of a potential risk for arrhythmias, including ventricular tachycardia and torsades de pointes.
B. QT interval that varies with HR in (option B) is normal because The QT interval alone can vary with heart rate, and this is considered a normal physiological adaptation.
C. QRS interval <0.12 seconds in (option C) is normal because The QRS interval represents the time it takes for ventricular depolarization and is normally less than 0.12 seconds.
D. PR interval 0.12 to 0.24 seconds in (option D) is normal because The PR interval represents the time it takes for atrial depolarization and conduction through the AV node. The normal range is typically 0.12 to 0.20 seconds.
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