Cardiac magnetic resonance to asess aortic valve anatomy in doubtful cases. Case series from a cardiology clinic

Abstract

Funding AcknowledgementsType of funding sources: None.IntroductionBicuspid aortic valve (BAV) is the most common congenital cardiac malformation, affecting 1-2% of the population, and several types have been described, each one with different prevalence. Partial raphae have also been described and much rarer congenital affectations of aortic valve also exist (unicuspid, quadricuspid), with its own classification. Although echocardiogram is usually enough for diagnosis, sometimes other exams are needed to assess the anatomy of the valve. In these cases, due to lack of radiation, Magnetic Resonance (MRI) can be performed.MethodsWe reviewed cases from a single general cardiology clinic in which MRI was needed for asses aortic valve anatomy during a period of 9 non-consecutive (due to Covid-19 pandemic) months, Characteristics of the patients, as well as valvular and aortic characteristics, were reported.ResultsThere 8 doubtful cases. 5 men. Mean Age 60 years old (range 21-77, 6 patients 58 or more). 6 cases were non-tricuspid aortic valve: 5 bicuspid, 1 quadricuspid. Except in rare anatomies (bicuspid with 2 cusps type lateral and quadricuspid), with age 21 and 38 respectively (both men), the mean age was 70, ranging from 58 to 77, with 3 cases (50%) women. Except 2 cases, MRI was performed after the first visit, without follow-up time. Taking into account all patients, mean time from first visit to perform MRI was 1,12 years (maximum 6 years in the quadricuspid case). 6 cases had valvular functional anomalies greater than mild (3 women). 5 cases presented aortic dilatation (3 men), 1 man without valvular functional anomalies, 1 woman with tricuspid aortic valve. BAV with 2 cusps type lateral and quadricuspid cases had no aortic dilatation. There were no extracardiac findings in the exams. Figure shows characteristics of patients. Figure 2 shows images from exams (in the superior left and inferior right part of the image are shown BAV with 2 cusps and quadricuspid valve repectively, in diastole and systole).ConclusionsClinicians usually think BAV is a problem of young people, but can be even diagnosed in the eighth decade of life. In these cases, senile changes with valvular degeneration make diagnosis more challenging with doubtful cases. Rare anatomies may be also challenging. MRI seems useful to assess doubtful cases. Although usually performed in the first visit, in some cases it can take years before MRI is performed. In older cases, there may be no sex predominance for BAV. Table: Characteristics of patients Figure. Images from exams