scholarly journals Triphasic Contrast Agent Injection in 64-MDCT Coronary Artery Angiography

2014 ◽  
Vol 4 (1) ◽  
pp. 12-22
Author(s):  
C Missiroli ◽  
Y Kim ◽  
S Shankar ◽  
J Chun ◽  
H Shin ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Coronary Arteries ◽  
Right Coronary Artery ◽  
Superior Vena ◽  
Vena Cava ◽  
Region Of Interest ◽  
Asymptomatic Patients ◽  
Streak Artifacts ◽  
The Right

Purpose: To evaluate image quality and cardiovascular enhancement after triphasic injection in 64-slice-CT coronary angiography (c-CTA). Methods: c-CTA of twenty-two asymptomatic patients following triphasic injection (65ml-contrast bolus + mixed 30ml-contrast and 20ml-saline bolus + 50ml-saline chaser) were retrospectively reviewed. Attenuation in the great vessels, cardiac chambers, and coronary arteries in 13 places were measured by region of interest. Also, differences in enhancement between the right coronary artery (RCA) and the right cardiac chambers (RCA versus right atrium or RA; RCA versus right ventricle or RV) were analyzed. Quality of images and contrast-related streak artifacts were subjectively assessed by 2 radiologists in consensus on a 4-point scale. Results: There was excellent enhancement in the coronary arteries (mean range 395.84-429.90 Hounsfield Units or HU), ascending aorta (mean 448.58 HU), descending aorta (mean 433.49 HU), and pulmonary artery (mean 385.45 HU). There was adequate difference in attenuation between RCA versus RA (mean range 126.12-148.43 HU) and RCA versus RV (mean range 50.34-72.66 HU). There was high and inhomogeneous attenuation in the superior vena cava (mean 509.23 HU). The quality of images was considered good (mean 1.6; 1 = excellent, 2 = good, 3 = moderate, 4 = low) and contrast-related streak artifacts were considered low (mean 2.9; 1 = severe, 2 = moderate, 3 = low, 4 = absent) by two radiologists. Conclusions: Our triphasic contrast injection provides excellent cardiovascular enhancement with minimal contrast-related streak artifacts, particularly in the right cardiac chambers while adequately differentiating the right coronary artery. DOI: http://dx.doi.org/10.3126/njr.v4i1.11365 Nepalese Journal of Radiology, Vol.4(1) 2014: 12-22

Arrhythmias

2014 ◽  
pp. 851-859
Author(s):  
Murali Chiravuri ◽  
Thomas M. Tadros ◽  
Usha B. Tedrow
Keyword(s):  
Coronary Artery ◽  
Right Coronary Artery ◽  
Superior Vena ◽  
Vena Cava ◽  
Av Node ◽  
Circumflex Artery ◽  
Left Circumflex Artery ◽  
Sa Node ◽  
Bundle Of His ◽  
The Right

In the normal heart the sinoatrial (SA) node serves as the principal pacemaker and determines the heart rate. The SA node consists of groups of pacemaker cells marked by their ability to spontaneously depolarize and are located at the junction of the right atrium and the superior vena cava. The blood supply to the SA node is variable with the sinus nodal artery arising from the right coronary artery in 60% percent of cases and from the left circumflex artery in 40% of cases. Following depolarization of the SA nodal cells, the signal traverses the atrium before arriving at the atrioventricular (AV) node. The AV node is marked by its ability to delay impulse propagation, which allows for coordinated contraction of the atria and ventricles. The AV nodal artery arises from the right coronary artery in 90% of cases and from the left circumflex artery in 10% of cases. After exiting the AV node, the impulse is transmitted through the bundle of His, the right and left bundle branches, and ultimately exits the terminal Purkinje fibers of the conduction system into the myocardium near the apex of the heart.

Fistula between the right coronary artery and the superior vena cava as a cause of anginal symptoms

2016 ◽  
pp. 86-86
Author(s):  
Anna Wichrowska ◽  
Arkadiusz Niklas ◽  
Maciej Frankiewicz ◽  
Artur Radziemski ◽  
Andrzej Tykarski
Keyword(s):  
Coronary Artery ◽  
Superior Vena Cava ◽  
Right Coronary Artery ◽  
Superior Vena ◽  
Vena Cava ◽  
The Right

Giant fistula of the right coronary artery to superior vena cava diagnosed on MSCT

2006 ◽  
Vol 96 (2) ◽  
pp. 120-121 ◽  
Author(s):  
Anke Opitz ◽  
Johannes Fraunhofer ◽  
Stefan Mang ◽  
Werner Moshage
Keyword(s):  
Coronary Artery ◽  
Superior Vena Cava ◽  
Right Coronary Artery ◽  
Superior Vena ◽  
Vena Cava ◽  
The Right

scholarly journals Anomalous origin of the right coronary artery with interarterial course: a mid-term follow-up of 28 cases

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Francisco Albuquerque ◽  
Pedro de Araújo Gonçalves ◽  
Hugo Marques ◽  
António Ferreira ◽  
Pedro Freitas ◽  
...  
Keyword(s):  
Coronary Artery ◽  
High Risk ◽  
Right Coronary Artery ◽  
Cardiac Death ◽  
Anomalous Origin ◽  
Cardiac Symptoms ◽  
Asymptomatic Patients ◽  
Increased Risk ◽  
The Right

AbstractAnomalous origin of the right coronary artery from the opposite sinus (right-ACAOS) with interarterial course (IAC) has been associated with increased risk of sudden cardiac death (SCD). Widespread use of coronary computed tomography angiography (CCTA) has led to increased recognition of this condition, even among healthy individuals. Our study sought to examine the prevalence, anatomical characteristics, and outcomes of right-ACAOS with IAC in patients undergoing CCTA for suspected coronary artery disease (CAD). We conducted a retrospective analysis of consecutive patients referred for CCTA at one tertiary hospital from January 2012 to December 2020. Patients exhibiting right-ACAOS with IAC were analyzed for cardiac symptoms and mid-term occurrence of first MACE (cardiac death, SCD, non-fatal myocardial infarction (MI) or revascularization of the anomalous vessel). CCTAs were reviewed for anatomical high-risk features and concomitant CAD. Among 10,928 patients referred for CCTA, 28 patients with right-ACAOS with IAC were identified. Mean age was 55 ± 17 years, 64% were male and 11 (39.3%) presented stable cardiac symptoms. Most patients had at least one high risk anatomical feature. During follow-up, there were no cardiac deaths or aborted SCD episodes and only 1 patient underwent surgical revascularization of the anomalous vessel. Right-ACAOS with IAC is an uncommon finding (prevalence of 0.26%). In a contemporary population of predominantly asymptomatic patients who survived this condition well into adulthood, most patients were managed conservatively with a low event rate. Additional studies are needed to support medical follow-up as the preferred option in this setting.

Vascular aneurysm producing divided right atrium in a patient with pulmonary atresia and intact ventricular septum

2000 ◽  
Vol 10 (3) ◽  
pp. 281-285 ◽  
Author(s):  
John C. Wood ◽  
Miguel Reyes-Mugica ◽  
Gary Kopf
Keyword(s):  
Coronary Artery ◽  
Coronary Arteries ◽  
Right Coronary Artery ◽  
Right Atrium ◽  
Pulmonary Atresia ◽  
Pulmonary Trunk ◽  
Ventricular Septum ◽  
Intact Ventricular Septum ◽  
Atrioventricular Groove ◽  
The Right

AbstractWe describe a patient with pulmonary atresia and intact ventricular septum in whom the right atrium was divided by a vascular aneurysm located in the right atrioventricular groove. We postulate that the structure represents an aneursymally dilated right coronary artery taking anomalous origin from the pulmonary trunk, with fistulous communication to the right atrium. We discuss the findings relative to concepts of development of the coronary arteries in normal hearts and in pulmonary atresia with an intact ventricular septum.

Ischaemic heart disease: coronary artery anomalies

2016 ◽  
Author(s):  
Eugenio Picano ◽  
Fausto Pinto ◽  
Blazej Michalski
Keyword(s):  
Coronary Artery ◽  
Coronary Arteries ◽  
Cardiac Death ◽  
Incidental Finding ◽  
Superior Vena ◽  
Vena Cava ◽  
Coronary Anomalies ◽  
Coronary Artery Anomalies ◽  
Venous Structure ◽  
Coronary Artery Segment

Coronary anomalies occur in less than 1% of the general population and their clinical presentation can range anywhere from a benign incidental finding to the cause of sudden cardiac death. Since congenital coronary arteries anomalies are often considered as the first cause of cardiac death in young athletes in Europe, careful attention has to be paid in this specific subpopulation in case of suggestive symptoms. Although focused expert echocardiography is the first-line imaging tool, coronary computed tomography or radiation-free magnetic resonance imaging are recommended for more definitive definition of the coronary course in persons suspected of having coronary artery anomalies. Most coronary anomalies belong to the group of anomalous origin. Aneurysms are defined as dilations of a coronary vessel 1.5 times the normal adjacent coronary artery segment. Coronary artery fistulas are communications between one or more coronary arteries and a cardiac chamber (coronary-cameral), the pulmonary artery, or a venous structure (such as the sinus or superior vena cava).

scholarly journals Angiographic profile of coronary arteries in Keralite population

2014 ◽  
Vol 03 (03) ◽  
pp. 143-149
Author(s):  
Apsara M P.
Keyword(s):  
Coronary Artery ◽  
Coronary Arteries ◽  
Right Coronary Artery ◽  
Research Work ◽  
Myocardial Revascularization ◽  
Chi Square ◽  
Circumflex Artery ◽  
Chi Square Test ◽  
The Right ◽  
Coronary Angiograms

Abstract Background and aims: The incidence of Coronary Artery Disease (CAD) has reached alanning proportions in India. The pathological hall mark of CAD is myocardial ischemia resulting from the atherosclerotic narrowing of coronary arteries. In this era of advanced interventions and cardiac surgery, a thorough knowledge of normal and variant anatomy of coronary arteries is of prime significance and of great use both to the clinicians and anatomists. Materials and methods: One hundred coronary angiograms of patients free of disease were studied in detail in different profiles. The data obtained was quantified according to their frequencies. The relation between the length of left main coronary artery and coronary artery dominance was statistically analyzed using the 'Chi Square test for Trend'. Results: This study highlighted some interesting findings such as the origin of Sino- atrial nodal artery from the second segment of right coronary artery in 3% of cases, double right marginal artery in 4% cases. Other variations such as Mouchet's posterior recurrent interventricular artery, origin of circumflex artery from the right coronary artery and abnormal communication between the terminal parts of right coronary artery and circumflex artery were each noticed in 1 % of cases. Conclusions: Coronary arteries and their branches are prone to variations in their course and morphology. Prior knowledge about this is important for the interpretation of coronary angiograms and surgical myocardial revascularization. The present work on normal and variant pattern of coronary arteries will help in gathering momentum to the already advancing research work in this field.

Sign in / Sign up

Export Citation Format

Share Document