Apical myectomy

A new surgical technique for management of severely symptomatic patients with apical hypertrophic cardiomyopathy

Hartzell V Schaff, Morgan L. Brown, Joseph A. Dearani, Martin D. Abel, Steve R. Ommen, Paul Sorajja, A. Jamil Tajik, Rick A. Nishimura

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Objective: Apical hypertrophic cardiomyopathy is a morphologic variant in which the hypertrophy is primarily localized to the apex of the left ventricle. A subset of patients have progressive, drug-refractory diastolic heart failure with severely limiting symptoms caused by low cardiac output. Heart transplantation has been the only therapeutic option available for such patients. This study analyzes clinical and hemodynamic outcomes of a novel surgical technique to improve diastolic filling by means of left ventricular cavity enlargement. Methods: Forty-four symptomatic patients underwent apical myectomy to augment left ventricular end-diastolic volume. Myectomy was performed through an apical incision, and hypertrophic muscle was excised at the apex and midventricle. Information from a prospective database was supplemented by surveys, patient contact, and medical records. Results: The mean age of the patients was 50 ± 17 years, and 66% were women. All patients were severely limited with dyspnea, 61% had angina, and 59% had syncope/presyncope. Ninety-one percent of patients were in New York Heart Association class III or IV. A mean of 16 ± 7 g of muscle was removed. Preoperative and postoperative hemodynamic catheterization (n = 14) showed a decrease in left ventricular end-diastolic pressure from 28 ± 9 to 24 ± 7 mm Hg (P = .002) and an increase in end-diastolic volume index from 55 ± 17 to 68 ± 18 mL/m2 (P = .003). Invasive measurements of stroke volume increased from 56 ± 17 to 63 ± 19 mL (P = .007). Of the 42 patients who survived to hospital discharge, 41 had improvement in symptoms. Mean peak maximum oxygen consumption with exercise (n = 5) increased from 13.5 ± 4.4 to 15.8 ± 4.6 mL/kg per minute. Survival at 1, 3, and 5 years was 95%, 81%, and 81%, respectively. At follow-up of 2.6 ± 3.1 years, 23 (74%) patients were in New York Heart Association class I or II. One patient underwent heart transplantation 5 years after apical myectomy. Conclusions: Apical myectomy improves functional status by decreasing left ventricular end-diastolic pressure, improving operative compliance, and increasing stroke volume. This procedure might be of value in other patients with hypertrophic cardiomyopathy who have severe hypertrophy and small left ventricular end-diastolic volume.

Original languageEnglish (US)
Pages (from-to)634-640
Number of pages7
JournalJournal of Thoracic and Cardiovascular Surgery
Volume139
Issue number3
DOIs
StatePublished - Mar 2010

Fingerprint

Hypertrophic Cardiomyopathy
Stroke Volume
Syncope
Heart Transplantation
Hypertrophy
Hemodynamics
Diastolic Heart Failure
Blood Pressure
Low Cardiac Output
Muscles
Oxygen Consumption
Catheterization
Dyspnea
Compliance
Heart Ventricles
Medical Records
Databases
Exercise

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Surgery
  • Pulmonary and Respiratory Medicine

Cite this

Apical myectomy : A new surgical technique for management of severely symptomatic patients with apical hypertrophic cardiomyopathy. / Schaff, Hartzell V; Brown, Morgan L.; Dearani, Joseph A.; Abel, Martin D.; Ommen, Steve R.; Sorajja, Paul; Tajik, A. Jamil; Nishimura, Rick A.

In: Journal of Thoracic and Cardiovascular Surgery, Vol. 139, No. 3, 03.2010, p. 634-640.

Research output: Contribution to journalArticle

Schaff, Hartzell V ; Brown, Morgan L. ; Dearani, Joseph A. ; Abel, Martin D. ; Ommen, Steve R. ; Sorajja, Paul ; Tajik, A. Jamil ; Nishimura, Rick A. / Apical myectomy : A new surgical technique for management of severely symptomatic patients with apical hypertrophic cardiomyopathy. In: Journal of Thoracic and Cardiovascular Surgery. 2010 ; Vol. 139, No. 3. pp. 634-640.
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abstract = "Objective: Apical hypertrophic cardiomyopathy is a morphologic variant in which the hypertrophy is primarily localized to the apex of the left ventricle. A subset of patients have progressive, drug-refractory diastolic heart failure with severely limiting symptoms caused by low cardiac output. Heart transplantation has been the only therapeutic option available for such patients. This study analyzes clinical and hemodynamic outcomes of a novel surgical technique to improve diastolic filling by means of left ventricular cavity enlargement. Methods: Forty-four symptomatic patients underwent apical myectomy to augment left ventricular end-diastolic volume. Myectomy was performed through an apical incision, and hypertrophic muscle was excised at the apex and midventricle. Information from a prospective database was supplemented by surveys, patient contact, and medical records. Results: The mean age of the patients was 50 ± 17 years, and 66{\%} were women. All patients were severely limited with dyspnea, 61{\%} had angina, and 59{\%} had syncope/presyncope. Ninety-one percent of patients were in New York Heart Association class III or IV. A mean of 16 ± 7 g of muscle was removed. Preoperative and postoperative hemodynamic catheterization (n = 14) showed a decrease in left ventricular end-diastolic pressure from 28 ± 9 to 24 ± 7 mm Hg (P = .002) and an increase in end-diastolic volume index from 55 ± 17 to 68 ± 18 mL/m2 (P = .003). Invasive measurements of stroke volume increased from 56 ± 17 to 63 ± 19 mL (P = .007). Of the 42 patients who survived to hospital discharge, 41 had improvement in symptoms. Mean peak maximum oxygen consumption with exercise (n = 5) increased from 13.5 ± 4.4 to 15.8 ± 4.6 mL/kg per minute. Survival at 1, 3, and 5 years was 95{\%}, 81{\%}, and 81{\%}, respectively. At follow-up of 2.6 ± 3.1 years, 23 (74{\%}) patients were in New York Heart Association class I or II. One patient underwent heart transplantation 5 years after apical myectomy. Conclusions: Apical myectomy improves functional status by decreasing left ventricular end-diastolic pressure, improving operative compliance, and increasing stroke volume. This procedure might be of value in other patients with hypertrophic cardiomyopathy who have severe hypertrophy and small left ventricular end-diastolic volume.",
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T2 - A new surgical technique for management of severely symptomatic patients with apical hypertrophic cardiomyopathy

AU - Schaff, Hartzell V

AU - Brown, Morgan L.

AU - Dearani, Joseph A.

AU - Abel, Martin D.

AU - Ommen, Steve R.

AU - Sorajja, Paul

AU - Tajik, A. Jamil

AU - Nishimura, Rick A.

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N2 - Objective: Apical hypertrophic cardiomyopathy is a morphologic variant in which the hypertrophy is primarily localized to the apex of the left ventricle. A subset of patients have progressive, drug-refractory diastolic heart failure with severely limiting symptoms caused by low cardiac output. Heart transplantation has been the only therapeutic option available for such patients. This study analyzes clinical and hemodynamic outcomes of a novel surgical technique to improve diastolic filling by means of left ventricular cavity enlargement. Methods: Forty-four symptomatic patients underwent apical myectomy to augment left ventricular end-diastolic volume. Myectomy was performed through an apical incision, and hypertrophic muscle was excised at the apex and midventricle. Information from a prospective database was supplemented by surveys, patient contact, and medical records. Results: The mean age of the patients was 50 ± 17 years, and 66% were women. All patients were severely limited with dyspnea, 61% had angina, and 59% had syncope/presyncope. Ninety-one percent of patients were in New York Heart Association class III or IV. A mean of 16 ± 7 g of muscle was removed. Preoperative and postoperative hemodynamic catheterization (n = 14) showed a decrease in left ventricular end-diastolic pressure from 28 ± 9 to 24 ± 7 mm Hg (P = .002) and an increase in end-diastolic volume index from 55 ± 17 to 68 ± 18 mL/m2 (P = .003). Invasive measurements of stroke volume increased from 56 ± 17 to 63 ± 19 mL (P = .007). Of the 42 patients who survived to hospital discharge, 41 had improvement in symptoms. Mean peak maximum oxygen consumption with exercise (n = 5) increased from 13.5 ± 4.4 to 15.8 ± 4.6 mL/kg per minute. Survival at 1, 3, and 5 years was 95%, 81%, and 81%, respectively. At follow-up of 2.6 ± 3.1 years, 23 (74%) patients were in New York Heart Association class I or II. One patient underwent heart transplantation 5 years after apical myectomy. Conclusions: Apical myectomy improves functional status by decreasing left ventricular end-diastolic pressure, improving operative compliance, and increasing stroke volume. This procedure might be of value in other patients with hypertrophic cardiomyopathy who have severe hypertrophy and small left ventricular end-diastolic volume.

AB - Objective: Apical hypertrophic cardiomyopathy is a morphologic variant in which the hypertrophy is primarily localized to the apex of the left ventricle. A subset of patients have progressive, drug-refractory diastolic heart failure with severely limiting symptoms caused by low cardiac output. Heart transplantation has been the only therapeutic option available for such patients. This study analyzes clinical and hemodynamic outcomes of a novel surgical technique to improve diastolic filling by means of left ventricular cavity enlargement. Methods: Forty-four symptomatic patients underwent apical myectomy to augment left ventricular end-diastolic volume. Myectomy was performed through an apical incision, and hypertrophic muscle was excised at the apex and midventricle. Information from a prospective database was supplemented by surveys, patient contact, and medical records. Results: The mean age of the patients was 50 ± 17 years, and 66% were women. All patients were severely limited with dyspnea, 61% had angina, and 59% had syncope/presyncope. Ninety-one percent of patients were in New York Heart Association class III or IV. A mean of 16 ± 7 g of muscle was removed. Preoperative and postoperative hemodynamic catheterization (n = 14) showed a decrease in left ventricular end-diastolic pressure from 28 ± 9 to 24 ± 7 mm Hg (P = .002) and an increase in end-diastolic volume index from 55 ± 17 to 68 ± 18 mL/m2 (P = .003). Invasive measurements of stroke volume increased from 56 ± 17 to 63 ± 19 mL (P = .007). Of the 42 patients who survived to hospital discharge, 41 had improvement in symptoms. Mean peak maximum oxygen consumption with exercise (n = 5) increased from 13.5 ± 4.4 to 15.8 ± 4.6 mL/kg per minute. Survival at 1, 3, and 5 years was 95%, 81%, and 81%, respectively. At follow-up of 2.6 ± 3.1 years, 23 (74%) patients were in New York Heart Association class I or II. One patient underwent heart transplantation 5 years after apical myectomy. Conclusions: Apical myectomy improves functional status by decreasing left ventricular end-diastolic pressure, improving operative compliance, and increasing stroke volume. This procedure might be of value in other patients with hypertrophic cardiomyopathy who have severe hypertrophy and small left ventricular end-diastolic volume.

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