The advanced practice registered nurse (APRN) examines an 92 year-old patient. The APRN notes a systolic ejection murmur (grade II out of VI), heard in the right upper sternal border and the right side off the neck. What is the most likely cause of the systolic murmur in this patient?

A. Abnormal: indicating elevated right atrial pressure (central venous pressure) is correct because the normal JVP is ≤3–4 cm above the sternal angle when the patient is at a 30–45° incline. A measurement greater than 5 cm above the sternal angle indicates elevated central venous pressure (CVP), which reflects increased right atrial pressure. Causes may include right-sided heart failure, fluid overload, tricuspid regurgitation, or constrictive pericarditis.

B. Normal: Indicating normal left atrial pressure is incorrect because JVP reflects right atrial pressure, not left atrial pressure. Left atrial pressure is assessed indirectly via pulmonary capillary wedge pressure, not by JVP.

C. Normal: Indicating normal right atrial pressure is incorrect because a JVP >5 cm is above the normal range. Normal right atrial pressure corresponds to a JVP ≤3–4 cm above the sternal angle.

D. Abnormal: indicating decreased right atrial pressure (central venous pressure) is incorrect because elevated JVP indicates increased, not decreased, right atrial pressure. A decreased JVP would be observed as flattened or nearly invisible jugular veins, which is the opposite finding.

A. Palpate vibrations transmitted through the chest wall with the patient saying "ninety-nine" is incorrect because this describes tactile fremitus, not chest expansion. Fremitus assesses the transmission of vocal vibrations through lung tissue and can indicate consolidation, effusion, or pneumothorax, but it does not measure lung excursion.

B. Assess the distance between the examiner's thumbs on the thorax during inspiration is correct because chest expansion (lung excursion) is assessed by placing the examiner’s hands with thumbs along the posterior thorax at the level of the 10th ribs, palms on the lower ribs, and fingers grasping the lateral rib cage. The APRN asks the patient to take a deep breath, and observes the distance the thumbs move apart during inspiration, which indicates lung expansion and diaphragmatic movement. This technique helps identify asymmetry or restriction in chest expansion, which may occur in conditions such as pleural effusion, pneumothorax, or atelectasis.

C. Determine the distance between the diaphragm on expiration and inspiration is incorrect because diaphragmatic excursion is assessed using percussion to measure the diaphragm’s movement, not by manual palpation of the thumbs. While related, diaphragmatic excursion is a separate assessment from chest expansion.

D. Percuss the anterior and posterior thorax using a ladder pattern is incorrect because percussion evaluates lung resonance, presence of consolidation, fluid, or air, but does not directly measure chest expansion. Percussion is an inspection of sound quality, not the mechanical movement of the chest wall.