Magnetic resonance imaging of microvascular obstruction in hypertrophic obstructive cardiomyopathy after percutaneous transluminal septal myocardial ablation

Abstract

The location of MO identified by MRI may be related to the effectiveness of PTSMA at the short-term follow-up. The left-sided MO is related to complete improvement in clinical symptoms and pressure gradients.

A modified method (MK method) of alcohol septal ablation for the treatment of hypertrophic obstructive cardiomyopahty

“…It has comparable procedural mortality and efficacy to surgical myectomy despite being complicated by a higher rate of complete heart block requiring a permanent pacemaker [1][2][3]. To improve efficacy and decrease the risk of complete heart block, it is of paramount importance to detect a target vessel that exclusively supplies the basal left interventricular septum (BLS) and to limit the amount of ethanol injected [4,5]. Failure to locate such a target vessel leads to an unsatisfactory procedural result or abortion of the procedure [2,4].…”

“…To improve efficacy and decrease the risk of complete heart block, it is of paramount importance to detect a target vessel that exclusively supplies the basal left interventricular septum (BLS) and to limit the amount of ethanol injected [4,5]. Failure to locate such a target vessel leads to an unsatisfactory procedural result or abortion of the procedure [2,4]. One of the reasons for this failure is due to the difficulty of injecting ethanol into a small septal branch that is bifurcating at a steep angle.…”

Non-surgical septal reduction therapy in hypertrophic cardiomyopathy

“…Any fluid injected will therefore preferentially run towards the right side of the septum. The RV septum is a common site for undesirable infarction59 (figure 2). Right bundle branch block is reported in up to 60% of patients following ASA and may represent an underestimate 55 60–62.…”

Contrast-enhanced Steady-state Free Precession in the Assessment of Hypertrophic Obstructive Cardiomyopathy after Alcohol Septal Ablation

“…Previous studies have demonstrated a significant relationship of the location of MVO or MI to the effectiveness of ASA. 8,24 Fourth, the use of the parallel imaging technique and phased-array coil affected the estimate of the myocardial signals. 25 The imaging planes differed between LGE and ceSSFP.…”