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Funtional significance of the intermediate lesion in a single coronary artery assessed by fractional flow reserve.

Ha SJ, Kwon SH, Kim SJ - Korean J. Intern. Med. (2014)

View Article: PubMed Central - PubMed

Affiliation: Division of Cardiology, Department of Internal Medicine, Kyung Hee University Medical Center, Seoul, Korea.

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To the Editor, Congenital coronary artery anomalies are infrequently seen during coronary angiographic study, reportedly occurring in 0.64% to 1.3% of patients... A resting electrocardiogram demonstrated a convex-shaped ST-segment elevation in the precordial lead without reciprocal change... Laboratory findings including cardiac markers showed no abnormalities... To decide the functional significance of the stenosis in the distal LCx artery, we performed an FFR study with a pressure wire and found that there was no critical functional stenosis (FFR, 0.9) (Fig. 2D)... A single coronary artery is an extremely rare congenital anomaly characterized by a single coronary artery ostium from an aortic sinus, and is seen in only 0.024% to 0.066% of patients who undergo conventional coronary angiography... A single coronary artery is usually asymptomatic and has a benign course, and these patients have a normal life expectancy... FFR is a physiologic parameter that can be readily measured during the invasive procedure and can evaluate the functional significance of coronary stenosis... In particular, FFR plays an important role when making a decision for percutaneous coronary intervention (PCI) of angiographically moderate stenosis and assessing accurately the functional consequences of a given coronary stenosis with unclear hemodynamic significance... In addition, the clinical outcome of patients in whom PCI is deferred because FFR indicated no hemodynamically significant stenosis was very favorable... With FFR, we could make a decision for deferred PCI and choose medical treatment, even though coronary CT angiography and coronary angiography showed moderate stenosis in the LCx artery... In conclusion, FFR could successfully evaluate the functional significance of a moderate stenotic lesion in a single coronary artery where the RCA originated from the terminal portion of the LCx artery.

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(A) The single coronary artery visualized in the caudal angulation. (B) The left anterior oblique caudal view of selective left coronary angiography showed a stenosis of 60% in the distal left circumflex (LCx) proper artery (arrow). (C) Aortogram showed the absence of the right coronary ostium in the right sinus of Valsalva. (D) Flow fractional reserve demonstrated no functional significance of stenosis of the distal LCx proper artery.
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Figure 2: (A) The single coronary artery visualized in the caudal angulation. (B) The left anterior oblique caudal view of selective left coronary angiography showed a stenosis of 60% in the distal left circumflex (LCx) proper artery (arrow). (C) Aortogram showed the absence of the right coronary ostium in the right sinus of Valsalva. (D) Flow fractional reserve demonstrated no functional significance of stenosis of the distal LCx proper artery.

Mentions: To differentiate single coronary artery from CTO of the RCA ostium and confirm the degree of stenosis in the distal LCx artery, we performed coronary angiography. Selective left coronary angiography displayed normal origin and course of the left main, LCx, and left anterior descending arteries. The LCx artery did not terminate after reaching the crux; giving rise to the posterior descending branch, it coursed in the right atrioventricular groove as if it were the RCA and ended when it reached the right sinus of Valsalva (Fig. 2A). There was a stenosis of 60% diameter in the distal part of the LCx proper where the RCA arose (Fig. 2B). Attempts to engage the right coronary catheter into the RCA ostium were futile, and aortography obtained in the left anterior-oblique projection displayed the absence of the ostium of the RCA in the right sinus of Valsalva (Fig. 2C). To decide the functional significance of the stenosis in the distal LCx artery, we performed an FFR study with a pressure wire and found that there was no critical functional stenosis (FFR, 0.9) (Fig. 2D). The patient was discharged with medications of aspirin, statin, nitrate, and β blocker and free from chest pain.


Funtional significance of the intermediate lesion in a single coronary artery assessed by fractional flow reserve.

Ha SJ, Kwon SH, Kim SJ - Korean J. Intern. Med. (2014)

(A) The single coronary artery visualized in the caudal angulation. (B) The left anterior oblique caudal view of selective left coronary angiography showed a stenosis of 60% in the distal left circumflex (LCx) proper artery (arrow). (C) Aortogram showed the absence of the right coronary ostium in the right sinus of Valsalva. (D) Flow fractional reserve demonstrated no functional significance of stenosis of the distal LCx proper artery.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4219973&req=5

Figure 2: (A) The single coronary artery visualized in the caudal angulation. (B) The left anterior oblique caudal view of selective left coronary angiography showed a stenosis of 60% in the distal left circumflex (LCx) proper artery (arrow). (C) Aortogram showed the absence of the right coronary ostium in the right sinus of Valsalva. (D) Flow fractional reserve demonstrated no functional significance of stenosis of the distal LCx proper artery.
Mentions: To differentiate single coronary artery from CTO of the RCA ostium and confirm the degree of stenosis in the distal LCx artery, we performed coronary angiography. Selective left coronary angiography displayed normal origin and course of the left main, LCx, and left anterior descending arteries. The LCx artery did not terminate after reaching the crux; giving rise to the posterior descending branch, it coursed in the right atrioventricular groove as if it were the RCA and ended when it reached the right sinus of Valsalva (Fig. 2A). There was a stenosis of 60% diameter in the distal part of the LCx proper where the RCA arose (Fig. 2B). Attempts to engage the right coronary catheter into the RCA ostium were futile, and aortography obtained in the left anterior-oblique projection displayed the absence of the ostium of the RCA in the right sinus of Valsalva (Fig. 2C). To decide the functional significance of the stenosis in the distal LCx artery, we performed an FFR study with a pressure wire and found that there was no critical functional stenosis (FFR, 0.9) (Fig. 2D). The patient was discharged with medications of aspirin, statin, nitrate, and β blocker and free from chest pain.

View Article: PubMed Central - PubMed

Affiliation: Division of Cardiology, Department of Internal Medicine, Kyung Hee University Medical Center, Seoul, Korea.

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

To the Editor, Congenital coronary artery anomalies are infrequently seen during coronary angiographic study, reportedly occurring in 0.64% to 1.3% of patients... A resting electrocardiogram demonstrated a convex-shaped ST-segment elevation in the precordial lead without reciprocal change... Laboratory findings including cardiac markers showed no abnormalities... To decide the functional significance of the stenosis in the distal LCx artery, we performed an FFR study with a pressure wire and found that there was no critical functional stenosis (FFR, 0.9) (Fig. 2D)... A single coronary artery is an extremely rare congenital anomaly characterized by a single coronary artery ostium from an aortic sinus, and is seen in only 0.024% to 0.066% of patients who undergo conventional coronary angiography... A single coronary artery is usually asymptomatic and has a benign course, and these patients have a normal life expectancy... FFR is a physiologic parameter that can be readily measured during the invasive procedure and can evaluate the functional significance of coronary stenosis... In particular, FFR plays an important role when making a decision for percutaneous coronary intervention (PCI) of angiographically moderate stenosis and assessing accurately the functional consequences of a given coronary stenosis with unclear hemodynamic significance... In addition, the clinical outcome of patients in whom PCI is deferred because FFR indicated no hemodynamically significant stenosis was very favorable... With FFR, we could make a decision for deferred PCI and choose medical treatment, even though coronary CT angiography and coronary angiography showed moderate stenosis in the LCx artery... In conclusion, FFR could successfully evaluate the functional significance of a moderate stenotic lesion in a single coronary artery where the RCA originated from the terminal portion of the LCx artery.

Show MeSH
Related in: MedlinePlus