Perioperative clinical decision-making in surgery for mitral valve repair.

Echocardiography has played a critical role in the progress in mitral valve reconstructive surgery which was revolutionized as ''the French correction'' by Alain Carpentier in the mid 1980s. Mitral regurgitation (MR) is the most challenging valvular heart disease throughout the world and is related to rheumatic etiology in the underdeveloped world and to degenerative etiology in the Western world. Echocardiography plays an integral role in the management of patients with significant MR. This includes evaluation and follow-up during the medical management phase of MR to intraoperative mitral valve repair and post operative follow-up, using a combination of transthoracic echocardiography and transesophageal echocardiography. Newer developments include evaluation by transthoracic and transesophageal three-dimensional echocardiography. This review summarizes role of echocardiography in diagnosis, therapy and follow-up of patients with clinically significant MR. Discussion will focus on mitral valve repair for degenerative MR of myxomatous etiology and functional and ischemic MR.

Novel method of biventricular pacemaker optimization by radial artery tonometer. A case report.

Echocardiographic guided pacemaker optimization leads to significant improvement in cardiac function among nonresponders to cardiac resynchronization treatment (CRT). Simpler, noninvasive determination of cardiac function during biventricular pacemaker programming may simplify this procedure. In this report we describe a 73 year old male patient who presented with recent onset NYHA class III symptoms 7 months post-CRT for ischemic cardiomyopathy. During pacemaker optimization using A-pacing at 60 bpm, optimal atrioventricular (AV) delay was found to be 290 ms by both pulsed wave (PW) echo Doppler as well as by the simultaneously measured radial artery pulse waveform analysis by tonometry. No discernable atrial mechanical activity was visible despite presence of sinus rhythm up to an AV delay of 190 ms. Further improvement in cardiac function and decrease in mechanical dyssynchrony was shown with VV optimization by tissue Doppler imaging (TDI). Our report emphasizes the need for individualized biventricular pacemaker optimization post-CRT and that concomitant assessment via radial artery pulse waveform analysis by tonometry along with PW and TDI may provide additional information during pacemaker programming to assist in pacemaker optimization.

Ultrasound vascular screening for cardiovascular risk assessment. Why, when and how?

Carotid artery vessel wall assessment in the form of intima-media thickness (IMT) has been identified since the late 1970's as a sensitive tool to detect atherosclerosis, predict its sequelae and detect its progression and regression. Unfortunately the technique has remained confined to large multicenter clinical research trials and no consensus has been developed regarding methodology, analysis and interpretation and no agreed upon clinical protocol that could be used in clinical practice exists. The need for an accepted clinical protocol has become acute especially since the technique has been recommended by writing groups such as American Heart Association as a useful tool for risk stratification in those with unclear or intermediate risk of cardiovascular (CV) disease. The advent of automated edge detection software and a reimbursement of this technique by insurers make it compelling that clinical consensus is reached soon. Accurate data collection methodology and measurement precision are essential; as such a method that is sensitive yet not cumbersome is required for clinical utility. This review will give a short introduction to the studies that confirm value of IMT in detecting atherosclerosis and predicting its sequelae, followed by a discussion on the appropriate clinical method of imaging and reporting. Other controversial areas in methodology such as difference between plaque vs IMT in CV risk prediction will be discussed. Finally tools and skill a clinician will need to be able to do this technique will be discussed.

Myocardial contractile reserve on dobutamine echocardiography predicts late spontaneous improvement in cardiac function in patients with recent onset idiopathic dilated cardiomyopathy.

OBJECTIVES: The purpose of this study was to determine whether identification of contractile reserve with dobutamine would predict recovery of myocardial function during follow-up in patients with recent onset idiopathic dilated cardiomyopathy (IDC). BACKGROUND: The prognosis of patients presenting with new onset IDC is variable and difficult to predict. METHODS: Twenty-two patients (17 men, 5 women, 46 +/- 14 years) with recently diagnosed IDC (4 +/- 3 months) underwent dobutamine echocardiography. Left ventricular ejection fraction (LVEF) and LV sphericity before and at peak dobutamine infusion (30 +/- 11 microg/kg/min) were determined. A follow-up echocardiographic assessment was done at 6 +/- 4 months. RESULTS: The LVEF on dobutamine was directly related to baseline LV mass expressed as g/ml (Pearson r = 0.65, p = 0.0003). Baseline variables that were significantly predictive of follow-up LVEF were deceleration time (r = 0.69, p = 0.0006), wall motion score index (WMSI) (r = -0.63, p = 0.002), LV mass (r = 0.56, p = 0.008) and LVEF on dobutamine (r = 0.84, p = 0.0001). When either deceleration time or WMSI or LV mass was entered into a regression equation to predict follow-up LVEF, the LVEF on dobutamine added significantly to predictive power. However, if LVEF on dobutamine was entered first, none of the other three variables added significantly to prediction. Baseline LV sphericity at end diastole (ED) (r = 0.13, p = 0.6) did not correlate with follow-up LV sphericity in ED, whereas LV sphericity in ED on dobutamine (ED [r = 0.70, p = 0.0004]) correlated with LV sphericity in ED on follow up. CONCLUSIONS: This study demonstrates that dobutamine-induced improvement in baseline LVEF and LV sphericity identifies patients with IDC who exhibit substantial improvement in LV function and geometry over time.

Pacing stress echocardiography: an alternative to pharmacologic stress testing.

OBJECTIVES: We sought to evaluate the diagnostic accuracy and feasibility of bedside pacing stress echocardiography (PASE) as a potential substitute for pharmacologic stress echocardiography in patients admitted to the hospital with new-onset chest pain or worsening angina pectoris. BACKGROUND: Accurate and rapid noninvasive identification and evaluation of the extent of coronary artery disease (CAD) is essential for optimal management of these patients. METHODS: Bedside transthoracic stress echocardiography was performed in 54 consecutive patients admitted to a community hospital with new-onset chest pain, after acute myocardial infarction had been excluded. We used 10F transesophageal pacing catheters and a rapid and modified pacing protocol. The PASE results were validated in all patients by coronary angiography performed within 24 h of the test. Significant CAD was defined as > or =75% stenosis in at least one major epicardial coronary artery. RESULTS: The sensitivity of PASE for identifying patients with significant CAD was 95%, specificity was 87% and accuracy was 92%. The extent of significant CAD (single- or multivessel disease) was highly concordant with coronary angiography (kappa = 0.73, p<0.001). Pacing stress echocardiography was well tolerated, and only 4% of the patients had minor adverse events. The mean rate-pressure product at peak pacing was 22,313+/-5,357 beats/min per mm Hg, and heart rate >85% of the age-predicted target was achieved in 94% of patients. The average duration of the bedside PASE test, including image interpretation, was 38+/-6 min. CONCLUSIONS: Bedside PASE is rapid, tolerable and accurate for identification of significant CAD in patients admitted to the hospital with new-onset chest pain or worsening angina pectoris.

Association of mitral annulus calcification, aortic valve sclerosis and aortic root calcification with abnormal myocardial perfusion single photon emission tomography in subjects age < or =65 years old.

OBJECTIVES: We examined the hypothesis that mitral annulus calcification (MAC), aortic valve sclerosis (AVS) and aortic root calcification (ARC) are associated with coronary artery disease (CAD) in subjects age < or =65 years. BACKGROUND: Mitral annulus calcification, AVS and ARC frequently coexist and are associated with coronary risk factors and CAD in the elderly. METHODS: We studied 338 subjects age < or =65 years who underwent evaluation of chest pain with myocardial perfusion single photon emission computed tomography (SPECT) and a two-dimensional transthoracic echocardiogram for other indications. The association of MAC, AVS and ARC with abnormal SPECT was evaluated by using chi-square analyses and logistic regression analyses. RESULTS: Compared with no or one calcium deposit and no or one coronary risk factor other than diabetes, multiple (> or =2) calcium (or sclerosis) deposits with diabetes or multiple (> or =2) coronary risk factors were significantly associated with abnormal SPECT in women age < or =55 years old (odds ratio [OR], 20.00), in women age >55 years old (OR, 10.00) and in men age < or =55 years old (OR, 5.55). Multivariate analyses identified multiple calcium deposits as a significant predictor for an abnormal SPECT in women (p < 0.001), younger subjects age < or =55 years (p < 0.05) and the total group of subjects (p < 0.01). CONCLUSIONS: When coronary risk factors are also taken into consideration, the presence of multiple calcium deposits in the mitral annulus, aortic valve or aortic root appears to be a marker of CAD in men < or =55 years old and women.

Aortic root infection in a prosthetic valve demonstrated by gallium-67 citrate SPECT.

A 70-year-old man presented with 6 weeks of worsening low back pain, fever, sweating, and weight loss with known severe lumbosacral osteoarthritis. His history included CABG in 1992, porcine aortic valve replacement, and permanent pacemaker implantation in 2002. CT of the chest, abdomen, and pelvis did not demonstrate a cause for the symptoms. Blood cultures grew penicillin-sensitive enterococcus and he was referred for evaluation of possible osteodiskitis or epidural abscess. Gallium planar imaging demonstrated increased activity in the lumbar spine, suspicious for the presence of infection, and activity was noted in the mid mediastinum as well. SPECT clearly showed increased Ga-67 activity in the region of the aortic root, suspicious for infection. A perivalvular aortic root abscess was subsequently demonstrated by transesophageal echo. This case illustrates the value of Ga-67 chest SPECT in patients with prosthetic valves for detection of endocarditis.

Echocardiography in cardiac resynchronization therapy.

Cardiac resynchronization therapy (CRT) is a new treatment modality for eligible patients with congestive heart failure (CHF). The premise of CRT is that it decreases inter and intra ventricular inhomogeneity during systolic contraction thereby improving efficiency of cardiac pump function. Presence of cardiac dyssynchrony appears to be a prerequisite for a response to CRT. Traditionally this inhomogeneity in contraction has been determined by electrocardiographic QRS widening. More recently several echocardiographic methods of assessment of dyssynchrony have become available. These methods utilize conventional M-mode and pulsed wave (PW) Doppler as well tissue Doppler imaging (TDI) METHODS: These echocardiographic parameters have been shown to be more important predictors of response to CRT than conventional QRS widening. This article will discuss echocardiographic methods of assessment of dyssynchrony and their role in predicting response to CRT. In addition role of echocardiography in post CRT pacemaker programming will also be discussed.

Does the presence and site of myocardial ischemia on perfusion scintigraphy predict the occurrence and site of future myocardial infarction in patients with stable coronary artery disease?

In 47 patients who had undergone myocardial scintigraphy, reversible perfusion abnormality was detected in only 28 segments (60%) that were the site of future acute myocardial infarction.

Frequency of echocardiographic improvement in left ventricular cavity size and contractility in idiopathic-dilated cardiomyopathy.

In this study, we used 2-dimensional echocardiography to serially evaluate 32 patients with recent onset dilated cardiomyopathy. We found that in 12 patients (37%) there was resolution of left ventricular dilation as well as concomitant normalization of left ventricular contractility.

Usefulness of left ventricular mass in predicting recovery of left ventricular systolic function in patients with symptomatic idiopathic dilated cardiomyopathy.

Prognosis of idiopathic dilated cardiomyopathy (IDC) is variable. We determined the prognostic value of left ventricular (LV) mass and systolic and diastolic function in patients with IDC of <12 months duration. Clinical and echocardiographic assessment was performed at baseline and at 8+/-6 months follow-up in 25 patients (47+/-13 years) with IDC and an LV ejection fraction (LVEF1) of <40% (22+/-7%). Based on a follow-up LVEF (LVEF2) of < or >40%, patients were divided into unimproved (n = 13, LVEF2 = 21+/-9%) and improved groups (n = 12, LVEF2 = 51+/-11%). There was no difference in the LVEF1 (22+/-8% vs. 22+/-6%), LV end-systolic (5.7+/-0.8 vs. 5.8+/-0.9 cm) or end-diastolic (6.5+/-0.6 vs. 6.6+/-0.9 cm) dimension, wall stress (102+/-26 vs 99+/-28 g/cm2), end-systolic (1.7+/-0.3 vs. 1.8+/-0.2) or end-diastolic (1.7+/-0.3 vs. 1.6+/-0.1) sphericity, dp/dt (582+/-163 vs. 678+/-222 mm Hg/s), or right ventricular fractional shortening (20+/-9% vs. 27+/-7%, p = 0.06) in unimproved and improved groups. LV mass was lower (1.00+/-0.21 vs. 1.38+/-0.27 g/ml, p = 0007) and mitral inflow E-wave deceleration time shorter (97+/-42 vs. 164+/-58 ms, p = 0007) in the unimproved versus the improved group. On Pearson correlation analysis, LV mass (r = 0.62, p = 0.001), deceleration time (r = 0.68, p = 0.0002), wall motion score index (r = -0.47, p = 02), and dp/dt (r = 0.52, p = 03) were the significant predictors of LVEF2. There was correlation between LV mass (grams per milliliter) and deceleration time (r = 0.61, p = 0.001). During follow-up, death occurred in 1, and readmission for worsening heart failure in 4 patients in the unimproved group versus no hospitalization in the improved group. Thus, in patients with recent onset IDC, LV mass and diastolic function determine late outcome.

Transthoracic stress echocardiography with transesophageal atrial pacing for bedside evaluation of inducible myocardial ischemia in patients with new-onset chest pain.

To date, there are no data on the feasibility and accuracy of bedside pacing stress echocardiography in patients admitted to the hospital with new-onset chest pain or unstable angina. We evaluated the feasibility of pacing stress echocardiography and examined its correlation with myocardial perfusion stress scintigraphy (rest thallium-201/stress technetium-99m sestamibi dual-isotope myocardial perfusion single-photon emission computerized tomography) performed within 24 hours of the pacing stress echocardiography test. We studied 70 consecutive patients after acute myocardial infarction had been excluded. The bedside pacing stress echocardiography test was performed with 10Fr transesophageal pacing catheters. We found pacing stress echocardiography to be feasible and safe (3% minor adverse event rate) at the patients' bedside. Target heart rate of >85% of the age-predicted heart rate was achieved in 96% of patients, and the mean rate-pressure product was 22,644 +/- 4,520 beats/min/mm Hg. The mean duration of the bedside pacing stress echocardiography test including technical preparations and image interpretation was 41 +/- 7 minutes. Pacing stress echocardiography and myocardial perfusion stress scintigraphy correlated well for identification or exclusion of inducible myocardial ischemia in 63 of 70 patients (90%) (kappa 0.81, p <0.001). The extent of inducible myocardial ischemia by vascular territories correlated with myocardial perfusion stress scintigraphy in 52 of 70 patients (74%) (kappa 0.6, p <0.001). We conclude that bedside pacing stress echocardiography is feasible and safe, and highly correlates with myocardial perfusion stress scintigraphy for identifying inducible myocardial ischemia in patients with new onset of chest pain or unstable angina.

Transesophageal echocardiographic Doppler findings in patients with penetrating aortic ulcers.

Penetrating aortic ulcers and intramural hematomas cannot always be differentiated by transesophageal echocardiography. We suggest that color and pulsed-wave Doppler flow can be used for identifying penetrating aortic ulcers.

Echocardiographic and pathologic features of explanted Hancock and Carpentier-Edwards bioprosthetic valves in the mitral position.

Modes of failure of Hancock and Carpentier-Edwards (C-E) porcine bioprosthetic valves placed in the mitral position are not completely understood. We reviewed transesophageal echocardiographic (n = 19) and pathologic features of failed Hancock (n = 22) and C-E (n = 8) porcine mitral valves in 30 patients (mean age 70 +/- 13 years). Age at implantation (59 +/- 14 vs 58 +/-14 years, p = 0.9), time to implanted valve degeneration (13 +/- 5 vs 11 +/- 2 years, p = 0.3), and size of bioprosthesis (30 +/- 2 vs 31 +/- 2 mm, p = 0.14) of the implanted Hancock and C-E valves were similar. Anterior leaflet was flail in 15 versus flail posterior leaflet in 5 patients (p = 0.0004). Eccentric posterior mitral regurgitation jet was present in 12, eccentric anterior jet in 2, central jet in 2, and paravalvular jet in 3 patients. Stenosis of bioprosthesis was present in 1 1 Hancock versus 1 C-E valve (p = 0.06). Stent creep at any stent post was present in 14 Hancock versus no C-E valve (p = 0.0013). Large commissural dehiscence was present in 5 C-E versus 1 Hancock valve (p = 0.0006). Ring margin perforation was the most common perforation in Hancock valves (p <0.05, analysis of variance versus all other Hancock perforations). Dehiscence at the stent posts was the most common perforation in C-E valves (p <0.05 vs other C-E perforations, analysis of variance and p <0.001 versus Hancock valves). Thus, Hancock valves showed greater stenosis and stent creep, whereas C-E valves showed large dehiscences at the stent posts on explantation. The anterior leaflet degenerated most frequently in both valves. These findings suggest that the valve design may influence the mechanisms of porcine valve degeneration.

Evidence that high-density lipoprotein cholesterol is an independent predictor of acute platelet-dependent thrombus formation.

Plasma total and low-density lipoprotein (LDL) cholesterol are established risk factors for atherosclerotic vascular disease and may also contribute to a prothrombotic risk via enhanced platelet reactivity. This study examines whether high-density lipoprotein (HDL) cholesterol, which is inversely correlated with coronary artery disease, is associated with a reduced thrombogenic potential. Platelet thrombus formation was evaluated by exposing porcine aortic media placed in Badimon perfusion chambers to flowing nonanticoagulated venous blood for 5 minutes at a shear rate of 1,000 s(-1). Forty-five subjects, 23 normal (LDL 104 +/- 31, HDL 50 +/- 15 mg/dl) and 22 hypercholesterolemic (LDL 181 +/- 45, HDL 41 +/- 10 mg/dl) patients without coronary artery disease were studied. Platelet aggregation and CD62 antigen expression, and assay for circulating prothrombotic factors were also performed. In univariate analysis platelet thrombus formation correlated with weight (r = 0.33, p = 0.03), diastolic blood pressure (r = 0.39, p = 0.01), HDL cholesterol (r = -0.45, p = 0.003), total/HDL cholesterol (r = 0.43, p = 0.004) and LDL/HDL (r = 0.38, p = 0.01) ratios, and platelet CD62 expression (r = 0.41, p = 0.02). In multiple regression analysis only HDL cholesterol showed significant correlation with platelet thrombus formation (p = 0.03). Platelet aggregation and circulating prothrombotic factors did not correlate with platelet thrombus formation. A comparison between normal and hypercholesterolemic subjects revealed enhanced thrombus area (0.026 +/- 0.20 vs 0.045 +/- 0.039 mm2/mm; p = 0.04), resting CD62 expression (6 +/- 7% vs 15 +/- 10% positive platelets, p = 0.02), and platelet aggregation (16.7 +/- 5.2 vs 21.7 +/- 6.7 ohms, p = 0.04) in hypercholesterolemic subjects. Our results demonstrate that HDL cholesterol is a significant independent predictor of ex vivo platelet thrombus formation.

Myocardial Doppler tissue imaging: findings in inferior myocardial infarction and left ventricular hypertrophy--wall motion assessment.

BACKGROUND: Because of the geometry of the basal inferior wall and its relation with the posterior medial papillary muscle, differentiating abnormal from normal basal inferior wall motion can be challenging. METHODS: We performed pulsed wave Doppler echocardiography of the basal inferior wall and basal interventricular septum in 26 patients (63 +/- 14 years) with a normal echocardiogram, 33 patients (67 +/- 14 years) with inferior myocardial infarction (MI) associated with hypokinesis to dyskinesis of the basal inferior wall, and 38 patients (67 +/- 14 years) with left ventricular hypertrophy (LVH). RESULTS: Systolic velocity was significantly lower in the basal interventricular septum (0.071 +/- 0.013 m/s versus 0.084 +/- 0.023 m/s) and basal inferior wall (0.075 +/- 0.014 m/s versus 0.085 +/- 0.019 m/s) in the MI group compared with the LVH group, and both were significantly lower compared with normal values at the interventricular septum (0.090 +/- 0.023 m/s, P <.001, analysis of variance) and basal inferior wall (0.095 +/- 0.014 m/s, P <.0001, analysis of variance). The sum of the systolic (S), early diastolic (E'), and late diastolic (A') velocities of 0.30 m/s at the basal inferior wall had 91%, 76%, and 84% sensitivity, specificity, and accuracy, respectively, for the differentiation of a normal wall from an infarcted basal inferior wall, and 76%, 73%, and 75% sensitivity, specificity, and accuracy, respectively, for the differentiation of a normal wall from a hypertrophied basal inferior wall. The sum of systolic and diastolic velocities of 0.25 m/s at the basal interventricular septum had 70%, 66%, and 68% sensitivity, specificity, and accuracy, respectively, for the differentiation of an infarcted from a hypertrophied basal interventricular septum. Mitral inflow early-filling wave deceleration time by pulsed wave Doppler was the most sensitive parameter for the differentiation of LVH from MI (P <.0001). CONCLUSION: Doppler tissue imaging velocities of the basal inferior wall and basal interventricular septum may help differentiate normal from infarcted and hypertrophied myocardium.

Differential atrial stunning after electrical cardioversion: an echo tissue Doppler case study.

Left atrial stunning after cardioversion is a well-known phenomenon. It has been associated with higher risk of postcardioversion thromboemboli and increased risk of recurrence of atrial fibrillation. We present a case of differential atrial stunning after electrical cardioversion for atrial fibrillation. Diagnosis was made by pulsed wave Doppler of mitral, tricuspid, and pulmonary vein inflow and mitral and tricuspid annuli. Differential mechanical atrial stunning may be a common phenomenon after cardioversion and may suggest difference in right and left atrial transport function. Its prevalence needs to be determined by a large study. Doppler tissue imaging might be routinely used in patients after cardioversion for atrial fibrillation to detect atrial stunning.

Clinical, echocardiographic, and pathologic features of aortic wall dehiscence of porcine bioprosthetic valves: a cause of rapidly progressive mitral regurgitation and heart failure after bioprosthetic mitral valve replacement.

The aim of this study was to define the clinical, echocardiographic, and pathologic correlates of commissural dehiscence of aortic wall from the stent post of the porcine bioprostheses in the mitral position. This form of valve degeneration was found in 5 of 23 explanted mitral bioprostheses. A thickened, separated aortic wall at multiple commissural sites along with other evidence of valve degeneration was identified in the three patients who had chronic congestive heart failure. A large dehiscence at a single commissural site with otherwise normal valve morphology was present in the two patients who had acute heart failure. Two dimensional/Doppler echocardiography showed a prolapsing or a flail anteriorly positioned leaflet and an eccentric posteriorly directed mitral regurgitation jet in all patients. These echocardiographic findings in patients with a porcine bioprosthetic mitral valve should suggest commissural dehiscence from the aortic wall as a possible mechanism of valve failure. Exclusive involvement of the porcine aortic bioprosthesis placed in the mitral position along with involvement of strut of the bioprosthesis facing the aortic root in all cases suggests excessive hemodynamic stress on the valve in the mitral position and in particular on the anteriorly placed strut as the potential cause of this form of valve degeneration.

Comparison of myocardial tissue Doppler with transmitral flow Doppler in left ventricular hypertrophy.

We sought to determine the most useful echocardiographic measurements for assessment of diastolic function in patients with left ventricular hypertrophy (LVH) and normal systolic function. We compared myocardial Doppler velocities of the basal inferoposterior wall with mitral inflow pulsed wave Doppler velocities in 11 healthy volunteers (age, 36 +/- 6 years), 25 patients (age, 64 +/- 14 years) without LVH, and 37 patients (age, 67 +/- 14 years) with LVH and otherwise normal echocardiograms. The discriminatory measurements were myocardial A-wave duration (120 +/- 18 versus 98 +/- 20 and 92 +/- 12 ms, P <.0001), myocardial isovolumetric relaxation time (124 +/- 45 versus 95 +/- 48 and 78 +/- 25 ms, P =.0035), mitral A-wave velocity (0.98 +/- 0.37 versus 0.73 +/- 0.28 m/s and 0.61 +/- 0.22 m/s, P =.009), and mitral E-wave deceleration time (257 +/- 93 versus 201 +/- 85 ms and 184 +/- 83 ms, P =.015), which were significantly increased, and myocardial E-wave velocity (0.84 +/- 0.04 m/s versus 0.13 +/- 0.03 m/s and 0.14 +/- 0.03 m/s, P <.0001), which was significantly decreased, in patients with LVH compared with patients without LVH and normal volunteers, respectively. Left ventricular posterior wall thickness correlated with myocardial isovolumetric relaxation time (r = 0.52, P <.0001) and myocardial A-wave duration (r = 0.59, P <.0001), negatively with myocardial E wave (r = -0.43, P <.0001), and showed no correlation with mitral inflow parameters except mitral inflow A wave (r = 0.43, P =.002). On multivariate analysis using these variables, myocardial isovolumetric relaxation time (P =.0014) and A-wave duration (P =.001) were the only 2 variables that correlated with posterior wall thickness (multiple R = 0.71). In the presence of LVH and preserved left ventricular systolic function, myocardial relaxation time and velocities are more sensitive than mitral Doppler inflow parameters in detecting abnormal left ventricular relaxation.