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Case Reports
. 2022 Mar 23;15(3):e248159.
doi: 10.1136/bcr-2021-248159.

Abnormal blood supply to a normal lung: left circumflex artery branch supplying the right lung

Yamasandi Siddegowda Shrimanth  1 , Mandava Satya Sahitya  1 , Muniraju Maralakunte  2 , Bhupendra Kumar Sihag  3
Affiliations
Case Reports

Abnormal blood supply to a normal lung: left circumflex artery branch supplying the right lung

Yamasandi Siddegowda Shrimanth et al. BMJ Case Rep. .

Abstract

A middle-aged woman with hypertension presented with atypical chest pain of 1 month duration and had a positive exercise stress test. She underwent diagnostic coronary angiography which demonstrated an anomalous branch arising from the proximal part of the left circumflex artery supplying the right lung. She had atherosclerotic plaques in the right coronary artery and left anterior descending artery. Stress myocardial perfusion imaging did not reveal any inducible ischaemia in the left circumflex artery territory. She was started on medical therapy for coronary artery disease and is doing well on follow-up.

Keywords: cardiothoracic surgery; clinical diagnostic tests; interventional cardiology; ischaemic heart disease; radiology (diagnostics).

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Conflict of interest statement

Competing interests: None declared.

Figures

Figure 1
Figure 1
Coronary angiogram. (A) AP view showing the artery arising from the proximal portion of the left circumflex artery crossing the spine and reaching the hila of the right lung (arrows). (B) Demagnified AP view showing the course of the abnormal artery from LCX to the right lung upper lobe. (C) AP caudal view showing the origin from the proximal LCX (white arrow). (D) AP caudal view showing an otherwise normal LCX. (E) AP cranial view showing plaque in the proximal left anterior descending artery. (F) Left anterior oblique cranial view showing plaque in the mid-right coronary artery. AP, anteroposterior; LCX, Left circumflex artery.
Figure 2
Figure 2
CT. ECG-gated aortogram, volume-rendered images (A, B) showing the origin (arrowhead) and complete course (arrows) of the systemic arterial collateral channel from the left circumflex coronary artery. Maximum intensity projection coronal (C) and axial (D) reformatted images showing the mediastinal and hilar (right side) course of the systemic collateral arterial twig (red arrows) ultimately supplying the upper lobe of the right lung.
See this image and copyright information in PMC

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