Key result
Left ventricular anterior papillary muscles occur singly in ~90% of hearts, with larger dimensions than historically reported.
Why the study?
Papillary muscles in the left ventricle exhibit multiple anatomic variations relevant for clinical events, but detailed morphological characterization in a Colombian population was lacking.
Cross-Sectional (n=82)
No
This anatomical study provides morphological reference data for left ventricular papillary muscles in a Colombian population, highlighting a higher incidence of single papillary muscles and larger dimensions that may be relevant for imaging and valvular interventions.
Answers are grounded in this paper and cite their sources.
Population-specific papillary muscle anatomy in Colombian males may inform imaging and interventions; extends prior reports but leaves generalizability open.
Papillary muscles in the left ventricle present multiple anatomic expressions that are relevant for medical fields focusing on the understanding of clinical events involving these structures.Here, the aim was to perform a morphological characterization of the left ventricle papillary muscles in a sample of Colombian population.In the study were included eighty-two hearts from male individuals who underwent autopsy at the Institute of Legal Medicine and Forensic Sciences in Bucaramanga, Colombia.In each heart was carefully performed a longitudinal incision on the obtuse margin to visualize the papillary muscles.Data set was registered, and analysis of the continuous and categorical variables was carried out.Single anterior papillary muscle was observed in 74 samples (90.2 %) whereas this represented only 48 specimens (58.5 %) for the posterior papillary muscle (p = 0.3).Mean length and breadth of the anterior muscle were 29.9 ± 4.94 and 11.74 ± 2.75 mm, and those for the posterior muscle were 27.42 ± 7.08 and 10.83 ± 4.08 mm.Truncated apical shape was the most frequent type observed on the papillary muscles, anterior 41 (50 %) and posterior 37 (45.1 %), followed by flat-topped in the anterior 25 (30.5 %) and bifurcated in posterior muscle 14 (17.1 %).A mean of 9.04 ± 2.75 chordae raised from the anterior and 7.50 ± 3.3 from posterior papillary muscle.In our study we observed a higher incidence of single papillary muscles and slightly larger dimensions than information reported in the literature.The anatomic diversity of the papillary muscles should be considered for the correct image interpretation, valve implantation and performance evaluation on myocardial ischemic events.
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Ballesteros-Acuña et al. (2024) conducted a cross-sectional in Normal cardiac anatomy (n=82). Morphological assessment of left ventricle papillary muscles was evaluated on Morphological characteristics of left ventricle papillary muscles including presentation frequency, shape, and dimensions. In a sample of 82 Colombian male hearts, a single anterior papillary muscle was observed in 90.2% and a single posterior papillary muscle in 58.5%, displaying slightly larger dimensions than previously reported.
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