case_images: PMC7370807_01
case_images: The patient's electrocardiogram. The black arrow indicated the first-degree
  atrioventricular block. The red arrows indicate the poor R-wave
  progression.
case_images: 10.1177_2324709620921626-fig1.jpg
case_images: PMC7370807_01_10.1177_2324709620921626-fig1.jpg
case_images: fig1-2324709620921626
case_images: A 12-lead electrocardiogram revealed sinus rhythm with a first-degree atrioventricular block and poor R-wave progression (see Figure 1).
case_images: Two-dimensional transthoracic echocardiography series. (a) Parasternal
  long-axis view indicates the width of the central regurgitant jet, deemed
  trivial-mild. (b) A cross-sectional view of the aortic valve reveals the
  quadricuspid architecture enclosed by the red circumference. This is
  consistent with Hurwitz-Roberts class A and Nakamura type I morphology. (c)
  A cross-sectional view of the aortic valve reveals the central to mild
  trivial aortic regurgitant jet.
case_images: 10.1177_2324709620921626-fig2.jpg
case_images: PMC7370807_01_10.1177_2324709620921626-fig2.jpg
case_images: fig2-2324709620921626
case_images: Two-dimensional transthoracic echocardiography (2D-TTE) demonstrated a QAV with trivial to mild AR (see Figure 2a-c).
case_images: Cardiac computed tomography cross-sectional view revealing the
  Hurwitz-Roberts class A and Nakamura type I morphology quadricuspid aortic
  valve.
case_images: 10.1177_2324709620921626-fig3.jpg
case_images: PMC7370807_01_10.1177_2324709620921626-fig3.jpg
case_images: fig3-2324709620921626
case_images: A cardiac CT angiogram also revealed nonobstructive coronary artery disease with a calcium score of 0 and QAV (see Figure 3).