Table 2. Echocardiographic and clinical outcomes of patients with obstructive HCM undergoing myectomy.

Variables	Outcomes
Postoperative echocardiogram
LVOT resting gradient (mmHg)	0.6±5.4
LVOT resting gradient 30–49 mmHg	2 (0.5)
LVOT resting gradient ≥50 mmHg	2 (0.5)
LV ejection fraction (%)	59.7±6.3
LV ejection fraction <50%	17 (4.1)
Left atrial dimension (mm)	41.8±6.7
Most recent echocardiography**
LVOT resting gradient (mmHg)	1.2±6.8
LVOT resting gradient 30–49 mmHg	6 (1.3)
LVOT resting gradient ≥ 50 mmHg	3 (0.7)
LV ejection fraction (%)	58.9±7.2
LV ejection fraction <50%	25 (5.6)
Left atrial dimension (mm)	41.7±6.8
Most recent drug therapy**
Beta-blockers	363 (76.7)
Calcium channel blockers	66 (14.0)
Disopyramide	2 (0.4)
Amiodarone	46 (9.7)
ACE inhibitor/ARB	94 (19.9)
Diuretics	164 (34.7)
Anticoagulants	87 (18.2)
Warfarin	63 (13.3)
Novel oral anticoagulants	24 (5.0)
Most recent follow up**
Follow up time (years)	3.2±2.8
Age at last follow-up (years)	55.2±14.8
Alive	385 (96.3)
NYHA functional classification**
I	247 (64.2)
II	113 (29.3)
III	21 (5.5)
IV	4 (1.0)

Data are shown as n (%) or mean ± SD. **, includes only initial 400 patients operated on prior to 2016. LVOT, left ventricular outflow gradient; LV, left ventricle; LVED, left ventricle end diastole; ACE, angiotensin-converting enzyme; ARB, angiotensin II receptor blocker.